A Letter from Mr. Peter Wargentin, F. R. S. Secretary to the Royal Academy of Sciences at Stockholm, to the Rev. Nevil Maskelyne, B. D. F. R. S. and Astronomer Royal; Concerning the Difference of Longitude of the Royal Observatories at Paris and Greenwich, Resulting from the Eclipses of Jupiter's First Satellites, Observed during the Last Ten Years: To Which is Added, a Comparative Table of the corresponding Observations of the First Satellite, Made in the Principal Observatories

X. A Letter from Mr. Peter Wargentin, F. R. S. Secretary to the Royal Academy of Sciences at Stockholm, to the Rev. Nevil Maskelyne, B. D. F. R. S. and Astronomer Royal; concerning the Difference of Longitude of the Royal Observatories at Paris and Greenwich, resulting from the Eclipses of Jupiter's first Satellites, observed during the last Ten Years: to which is added, a Comparative Table of the corresponding Observations of the First Satellite, made in the principal Observatories. Vir plurimum reverende atque celeberrime, Read Feb. 6, 1777. PETIISTI in utrisque litteris tuis, "ve- "lim observationes satellitum Jovis, "præcipue primi, a te GRENOVICI, et a Cl. D. MESSIER "PARISII, ab anno 1765 habitas, inter se conferre, ut "inde eliciatur vera differentia utriusque meridiani:" huic desiderio tuo lubens satisfacio. Tuis observationibus primi satellitis non nisi 17 correspondentes MESSIERII obtigerunt; quarum 8 fuerunt immersiones immersiones, et 9 emersiones. Ipsas observationes, inter se et cum multis aliis, atque cum postrema editione measurementum tabularum (eà scilicet, quam alteri editioni astronomiae suae inseruit Cl. DELALANDIUS) comparatas, videoas in subjunctâ appendice, in quâ Paris Cl. indicat observationes MESSIERII, in palatio Clugny; Paris O. autem, in ipso observatorio regio habitas. Hic sufficiat attulisse resultantes a quovis immersionum et emersionum correspondentium pari, meridianorum differentias. | Ex immersionibus corresp. | Ex emersionibus. | |--------------------------|-----------------| | 1765, Dec. 24, prodit diff. merid. 8 35 | 1767, Apr. 9, differ. merid. 9 49 | | 1769, Apr. 12. 9 31 | 1768, Mai. 11. 9 29 | | Apr. 28. 9 58 | Jun. 3. 9 33 | | 1772, Jun. 9. 9 59 | Jun. 19. 10 16 | | Jul. 11. 9 23 | 1769, Mai. 16. 9 26 | | 1774, Sept. 26. 9 49 | Jun. 8. 9 45 | | Oct. 3. 9 26 | 1770, Aug. 5. 9 11 | | Oct. 21. 9 47 | 1773, Oct. 25. 9 23 | | Media ex imm. merid. differ. 9 39 | Nov. 1. 9 39 | | Med. exclusa prima, 9 42 | Media ex emersionibus, 9 37 | | | Med. exclusa quarta, 9 32 | Tu, vir celeberrime, fere semper usus es telescopio NEWTONIANO 6 pedum: CL. MESSIER plerumque GREGORIANO 2½ pedum, vel acromatico 3½ pedum, vel aliis æquales æqualis fere potentiæ, quorum neutrum non plusquam centies objectorum diametros amplificat. Æquales fere inventæ per immersiones et emersiones correspondentes meridianorum differentiæ, satis indicare videntur, ferme æqualis quoque præstantiæ fuisse utriusque observatoris instrumenta. Alium et certiorem modum ea comparandi nescio, præcipuè cum tu (a) nullibi indicaveris potentiam tui NEWTONIANI: nam longitudo sola ambiguum est argumentum. Per medium itaque deductum ex 7 paribus immersionum et 8 emersionum, invenitur differentia inter meridianum GRENOVICENSEM et observatorium CL. MESSIER, 9' 38"; vel seclusis uno immersionum uno emersionum pari, utpote quæ nimium a reliquis recedentem, indicant meridianorum differentiam, 9' 37"; adeoque foret inter observatorium GRENOVICENSE et regium Parisinum 9' 35", hoc est 19 secundis major quam hucusque putavimus. Obstupui videns tantam incertitudinem circa veram meridianorum differentiam inter duo præcipua orbis observatoria, eaque vicina, in quibus ingens observationum numerus, annis (a) The diameter of the aperture of this telescope is 9.4 inches, as is mentioned in the preface to my Greenwich Observations, from 1765 to 1774, published this year. N. M. plusquam 100, habitus est. Quid tum de aliis sentien- dum? Ab una parte vix persuadere mihi possim, tantum errorem tamdiu potuisse latere; vel comparatas observa- tiones eclipsium Solis, Lunae, occultationum fixarum, &c. tam multum potuisse fallere: ab altera, egregius 15 bo- narum observationum consensus, haud facile fortuitus, fidem quandam mereri videbatur; nisi observationes fa- tellitum, ad determinandas accurate longitudinum dif- ferentias, prorsus inepatis judicaveris. Ad tollendum hoc dubium, consului observationes primi satellitis, eodem tempore, in ipsis observatoriiis re- giis, quarum non nisi duae sunt immersiones, sed novem emersiones. | Immerf. | Emerf. | |---------|--------| | 1767, Jan. 12. diff. merid. | 9 16 | | 1772, Jul. 11. | 9 4 | | Medium ex hisce duabus, | 9 10 | | 1766, Apr. 11. | 9 55 | | 1767, Mart. 22. | 9 36 | | Apr. 16. | 9 32 | | Apr. 30. | 9 5 | | Mai. 9. | 9 47 | | Jun. 1. | 10 28 | | Jun. 3. | 9 4 | | 1769, Jun. 8. | 10 13 | | 1773, Oct. 5. | 9 37 | | Medium ex omnibus, exclusis 6a et 8a, | 9 42 | | | 9 32 | Harum Harum longe minor est consensus: si tamen sumatur medium, erit id $9' 26''$ vel $9' 21''$. Ulterius comparavi septem paria immersionum et 4 emersionum, annis 1761—1764, in utroque observatorio captarum: medium ex prioribus reperi $9' 26''$, ex posterioribus $9' 30''$. Et ne quid deesset, excussi quoque observationes ante annum 1700 factas; inter quas 12 immersiones correspondentes indicant, per medium, differentiam meridianorum $9' 57''$; sed 7 emersiones tantummodo $8' 45''$: ex hoc utroque medio resultat novum $9' 21''$. Porro tentavi, mediantibus meis observationibus, quorum multae tuis sunt correspondentes, multae Parisiensibus, quaestam stabilire meridianorum differentiam. Ego semper usus fum tubo achromatico DOLLONDIANO 10 pedum, cum oculari, quod objecta 90 amplificat, et valde distincta reddit. Immersi. ### Immerf. corresp. | Year | Month | Day | Hours | Minutes | Seconds | |--------|-------|-----|-------|---------|---------| | 1765 | Dec. | 1 | 1 | 12 | 34 | | (b) | 1766 | Oct. | 10 | 1 | 12 | | | 1768 | Apr. | 2 | 1 | 13 | | | 1769 | Mart.| 29 | 1 | 11 | | | 1774 | Sept.| 12 | 1 | 12 | | | Oct. | 3 | 1 | 12 | | | 1775 | Oct. | 1 | 1 | 12 | **Medium** | Year | Month | Day | Hours | Minutes | Seconds | |--------|-------|-----|-------|---------|---------| | | | | 1 | 12 | 14 | Sed tua observatio, die 10 Oct. 1766, vix recte se habere potest. Illâ neglectâ, manet ex reliquis medium, | Year | Month | Day | Hours | Minutes | Seconds | |--------|-------|-----|-------|---------|---------| | | | | 1 | 12 | 32 | ### Emerf. | Year | Month | Day | Hours | Minutes | Seconds | |--------|-------|-----|-------|---------|---------| | 1766 | Mart. | 5 | 1 | 12 | 11 | | 1767 | Jun. | 1 | 1 | 12 | 7 | | | 1768 | Jun. | 12 | 1 | 12 | | | 1769 | Mai. | 16 | 1 | 11 | | | Jun. | 8 | 1 | 12 | 19 | | 1771 | Aug. | 17 | 1 | 12 | 0 | | | Sept. | 25 | 1 | 12 | 8 | | 1772 | Sept. | 27 | 1 | 12 | 14 | | 1773 | Oct. | 25 | 1 | 12 | 31 | | 1774 | Dec. | 29 | 1 | 12 | 23 | | 1775 | Feb. | 22 | 1 | 12 | 16 | | | Dec. | 27 | 1 | 12 | 11 | **Medium ex his** | Year | Month | Day | Hours | Minutes | Seconds | |--------|-------|-----|-------|---------|---------| | | | | 1 | 12 | 11 | Observationes emersionum satis pulchrè conspirant: medium ex immersionibus et emersionibus innuit differentiam meridianorum Grenovicensis et Stockholmensis $1^h\ 12'\ 21''$. Persuasus sum eam $1^h\ 12'\ 20''$ vix esse minorem. Per medium ex 8 observationibus corresponden- (b) There was a mistake of twelve hours in setting down this observation at Greenwich, by the clock keeping sidereal time, which made an error of $1'\ 49''$ in the reduction to apparent time. The correct time of immersion is $16^h\ 59'\ 31''$, which happens to agree exactly with Mr. Wargentin's calculation, and the difference of longitude of Stockholm and Greenwich by this observation is $1^h\ 12'\ 14''$ instead of $1^h\ 10'\ 25$ set down above; and the mean difference from all the seven corresponding immersions is $1^h\ 12'\ 30''$. See the errata printed with my Observations. N. M. tibus, quae habitae sunt annis 1761—1764, emergit 1h 12' 25". Quod attinet differentiam meridianorum observatorii Parisiensis et Stockholmensis, ex 8 immersionibus et 13 emersionibus primi satellitis simul in utroque notatis ante annum 1760, conclusi eam, per medium, esse 1h 2' 51". Sed 7 immersiones et 12 emersiones correspondentes, factae post annum 1760, eam paulo minorem, scilicet 2' 47", reddunt. Nihilominus, cum per observationes quarundam eclipsium solarium evincere conati sunt celeberrimi viri, PINGRÉ, DU SEJOURS, et LEXELL, eam paucis secundis esse majorem, non refragabor assumere eam 1h 2' 55", qua subtracta ab inventa differentia observatoriorum Grenovicensis et Stockholmensis 1h 12' 21", restat differentia Grenovicensis et Parisiensis 9' 26". Omnes itaque haec disquisitiones testantur, differentiam quaestam majorem esse 9' 16" quantam hucusque existimavimus; et ni fallor ad 9' 25" proxime accedere; de qua re tamen totum ad te, vir celeberrime, defero judicium. Interim hinc appareat, arduum fane esse, praecisas meridianorum differentias, ope observationum satellitum Jovis, determinare. Fixarum occultationes a Lunâ, probè observatae et excussae, certorem sine dubio suppeditant methodum. Valde Valde miror, quare illi, qui bonum telescopium vel tubum habent, eo non semper in observandis satellitibus utantur, sed jam hoc, jam alio, forte minus praestanti. Observationes multum dubias, vel aeris vitio vel aliem ob caussam, ne quidem in diarium refero, nam nulla observatione praestat malae. Quantum malae observationes, pro bonis venditatae, me confuderint et torserint, dicere non possum. Quartus, die 8 Februarii hujus anni, eclipsin tantum partialem passus est. Magnum tuae in me amicitiae signum id interpretabor, si, quovis anno finito, tuas mecum communicare velis observationes satellitum; nam his, etiam senex, delector. Hanc quoque provinciam, examinandi motus satellitum, mihi, quasi tacito consensu, detulisse videntur collegae astronomi. Ceterum ingruens aetas, nimiæ occupationes quas secretarii munus injungit, defectus instrumentorum (nam murali nondum instructus sum, quidquid dicat Celeb. LALANDIUS) ut taceam modicas ingenii vires, vetant quo minus aliquid tuae vel aliorum exspectatione dignum praestare possim (c). Frigus hâc hieme in Suecia continuum fuit, a 28 Dec. ad 5 Februarii; sed neutiquam, pro ratione climatis, praeter (c) Notwithstanding the author's modesty, the astronomers of Europe know him better, and lament with him that he is not so well provided with capital instruments as he wishes and deserves to be. N. M. modum, rigidum: plerumque 5 vel 10 gradum thermometri REAUMURIANI. Diebus tantum 26 et 27 Januarii, ad 17 et 18 gradus exasperatum fuit. Minor quoque nivis copia apud nos fuit, quam pro solito. Miror itaque intensitatem frigoris, eodem tempore, apud exterros. Dab. Stockholmiae, die 19 Mart. 1776. Observationes primi satellitis Jovis in praecipuis observatorii habitae, inter se et cum tabulis comparatae. | Ann. | Temp. Observationis | Calculus | Diff. Calc. Observatorium | |------|---------------------|----------|--------------------------| | | M. D. | h ' " | h ' " | | 1765 | Sept. 21. | 16 53 22 | Im. 16 53 15 | o 7 — Stockholm. | | | Oct. 23. | 13 31 6 | — 13 31 30 | o 24 + Tyrnav. | | | Dec. 1. | 10 40 11 | — 10 40 48 | o 37 + Greenwich.| | | | 11 33 25 | — 11 33 33 | o 8 + Lund. | | | | 11 50 56 | — 11 51 0 | o 4 + Tyrnav. | | | | 11 52 45 | — 11 52 59 | o 14 + Stockholm.| | | 8. | 12 31 34 | — 12 31 25 | o 9 — Greenw. | | | 15. | 14 22 3 | — 14 21 40 | o 23 — Greenw. | | | | 15 31 40 | — 15 31 52 | o 12 + Tyrnav. | | | 17. | 10 1 15 | — 10 1 26 | o 11 + Stockh. | | | 22. | 16 12 19 | — 16 11 47 | o 32 — Greenw. | | | 24. | 10 39 27 | — 10 39 19 | o 8 — Greenw. | | | | 10 48 2 | — 10 48 37 | o 35 + Paris Cl. d. | | | | 11 49 6 | — 11 49 31 | o 25 + Tyrnav. | | 1766 | Jan. 2. | 8 8 44 | — 8 9 24 | o 40 + Stockh. d.| | | 9. | 9 40 16 | — 9 40 37 | o 21 + Lund. | | | 16. | 11 50 51 | — 11 51 17 | o 26 + Stockh. | | | 23. | 13 40 32 | — 13 41 28 | o 56 + Upsala d. | | | 25. | 8 8 30 | — 8 9 30 | i 0 + Upsala d. | Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |------|---------------------|-----------|---------------------------| | | M. D. | h ' " | h ' " | | 1766 | Jan. 25. | 8 10 39 | Im. 8 11 10 | o 31 + Stockholm. | | | Febr. 15. | 16 6 31 | Em. 16 6 14 | o 17 — Upsala. | | | | 24. | | o 28 + Stockholm. | | | Mart. 5. | 7 43 55 | | o 30 + Greenw. | | | | 8 55 4 | | o 8 — Upsala. | | | | 8 56 6 | | o 30 + Stockh. | | | | 9 45 36 | | o 3 + Peterfb. | | | | 10. | | o 31 + Paris. Cl. | | | | 15 20 27 | | o 21 + Paris. O. | | | | 15 20 35 | | o 9 + Paris. O. | | | | 12. | | o 9 + Paris. Cl. | | | | 9 49 54 | | o 9 + Paris. Cl. | | | | 9 49 56 | | o 26 + Lund. | | | | 10 33 12 | | o 18 + Tyrnav. | | | | 10 50 41 | | o 25 + Upsala. | | | | 10 50 53 | | o 45 + Stockh. | | | | 10 52 13 | | o 5 + Petersb. | | | | 11 41 56 | | o 7 — Lund. | | | | 12 30 15 | | o 2 + Upsal. d. | | | | 12 47 52 | | o 12 + Tyrnav. | | | | 21. | | o 37 + Greenw. | | | | 7 16 36 | | o 11 + Paris. Cl. | | | | 13 33 36 | | o 3 — Wien. | | | | 28. | | o 41 + Upsala. | | | | 8 12 33 | | o 8 + Tyrnav. | | | | 9 8 56 | | o 24 + Stockh. | | | Apr. 4. | 11 10 7 | | o 29 + Greenw. | | | | 11 10 21 | | o 10 — Paris. O. | | | | 11 12 4 | | o 6 — Wien. | | | | 11 56 30 | | o 31 + Paris. Cl. | | | | 12 6 25 | | o 10 + Paris O. | | | | 13 2 32 | | o 2 + Wien. | | | | 20. | | o 13 + Tyrnav. | | | | 8 31 18 | | | | | | 8 31 37 | | | | | | 9 27 56 | | | | | | 9 32 30 | | | Observationes Observationes comparatæ primi satellitis Jovis. | Anni. | Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |-------|----------------------|-----------|---------------------------| | | M. D. | h ' " | h ' " | | 1766. | Apr. 20. | 9 34 24 Em. | 9 34 42 | o 18 + Stockholm. | | | | 10 23 9 | - | 10 23 45 | o 36 + Petersb. | | | | 11 30 20 | - | 11 30 42 | o 22 + Stockh. | | May | 13. | 9 47 45 | - | 9 48 2 | o 17 + Tyrnav. | | | | 9 49 24 | - | 9 50 1 | o 37 + Stockholm. | | | | 11 25 12 | - | 11 25 4 | o 8 — Lund. | | Jun. | 5. | 9 54 1 | - | 9 53 44 | o 17 — Wien. | | | | 9 58 39 | - | 9 58 29 | o 10 — Tyrnav. | | Oct. | 10. (d) | 17 1 20 Im. | 16 59 31 | i 49 — Greenw. | | | | 18 11 45 | - | 18 11 42 | o 3 — Stockh. | | | | 16 27 59 | - | 16 28 13 | o 14 + Tyrnav. | | Nov. | 2. | 17 21 9 | - | 17 21 18 | o 9 + Paris. Cl. | | | | 18 22 20 | - | 18 22 12 | o 8 — Tyrnav. | | | | 18 24 19 | - | 18 24 11 | o 8 — Stockholm. | | | | 16 36 1 | - | 16 35 51 | o 10 — Tyrnav. | | | | 18 9 27 | - | 18 10 1 | o 34 + Lund. d. | | | | 18 29 37 | - | 18 29 27 | o 10 — Stockh. | | Dec. | 4. | 13 44 46 | - | 13 45 9 | o 23 + Paris. O. | | | | 13 44 53 | - | 13 45 11 | o 18 + Paris. Cl. | | | | 17 25 29 | - | 17 25 29 | o 0 — Paris. O. | | 1767. | Jan. 3. | 15 24 1 | - | 15 23 57 | o 4 — Greenw. | | | | 11 41 41 | - | 11 42 15 | o 34 + Greenw. | | | | 11 50 57 | - | 11 51 31 | o 34 + Paris. O. | | | | 15 34 34 | - | 15 34 40 | o 6 + Paris. Cl. | | Feb. | 2. | 17 26 54 | - | 17 27 20 | o 26 + Paris. Obs. | | | | 17 27 13 | - | 17 27 22 | o 9 + Paris. Cl. | | | | 9 18 13 | - | 9 18 44 | o 31 + Tyrnav. | | | | 11 14 44 | - | 11 15 14 | o 30 + Stockholm. | | | | 11 57 7 | - | 11 58 6 | o 59 + Greenw. d. | | Mart. | 17. | 8 12 16 Em. | 8 11 32 | o 44 — Tyrnav. | | | | 14 28 48 | - | 14 28 40 | o 8 — Greenw. | (d) This observation rightly reduced to apparent time is $16^h\ 59'\ 31''$, which happens to agree exactly with Mr. WARGENTIN's calculation. N. M. Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |------|---------------------|-----------|---------------------------| | | M. D. | h ' " | h ' " | | 1767 | Mar. 22. | 14 38 24 Em. | 14 37 56 | o 28 — Paris. O. | | | 31. | 12 4 36 | 12 5 9 | o 24 + Upsala. | | | | 12 4 54 | 12 4 41 | o 13 — Tyrnav. | | | | 12 6 28 | 12 6 40 | o 12 + Stockh. | | Apr. | 7. | 14 1 46 | 14 1 35 | o 11 — Upsala. | | | | 14 2 59 | 14 3 15 | o 16 + Stockh. | | | 9. | 7 20 1 | 7 20 13 | o 12 + Greenw. | | | | 7 29 50 | 7 29 31 | o 19 — Paris. Cl. | | | 14. | 14 47 52 | 14 47 36 | o 16 — Greenw. | | | 16. | 9 16 13 | 9 16 43 | o 30 + Greenw. | | | | 9 25 45 | 9 25 59 | o 14 + Paris. O. | | | 23. | 12 23 22 | 12 23 10 | o 12 — Tyrnav. | | | | 12 23 42 | 12 23 29 | o 13 — Upsala. | | | | 12 24 30 | 12 25 9 | o 39 + Stockh. | | | 30. | 13 9 10 | 13 8 47 | o 23 — Greenw. | | | | 13 18 15 | 13 18 3 | o 12 — Paris. O. | | Mai. | 9. | 9 32 26 | 9 32 58 | o 32 + Greenw. | | | | 9 42 13 | 9 42 14 | o 1 + Paris. O. | | | | 10 43 7 | 10 43 10 | o 3 + Tyrnav. | | | 16. | 12 38 6 | 12 37 54 | o 12 — Tyrnav. | | | 30. | 10 15 32 | 10 15 17 | o 15 — Philadelphia. | | Jun. | 1. | 9 44 1 | 9 44 20 | o 19 + Greenw. | | | | 9 54 29 | 9 53 36 | o 53 — Paris. O. d. | | | | 10 56 8 | 10 56 31 | o 23 + Stockh. | | | 8. | 11 37 42 | 11 37 49 | o 7 + Greenw. | | | | 11 46 46 | 11 47 5 | o 19 + Paris. O. | | Nov. | 21. | 19 10 24 Im. | 19 10 35 | o 11 + Lund. | | Dec. | 23. | 14 43 47 | 14 43 45 | o 2 — Paris. Cl. | | | 30. | 16 24 27 | 16 24 16 | o 11 — Greenw. | | 1768 | Jan. 22. | 16 24 13 | 16 23 37 | o 36 — Greenw. | | | 31. | 12 53 11 | 12 52 56 | o 15 — Paris. O. | | | | 12 53 22 | 12 52 58 | o 24 — Paris. Cl. | Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |------|---------------------|-----------|--------------------------| | | M. D. | h ' " | h ' " | | 1768 | Feb. 14. | | | | | 16 39 50 Im. | 16 39 28 | o 22 — Paris. Cl. | | | 17 42 37 | 17 42 21 | o 16 — Stockh. | | | 16. | 12 8 37 | o 37 + Upsala. | | | 12 8 54 | 12 8 55 | o 1 + Tyrnav. | | | 12 11 9 | 12 10 54 | o 15 — Stockh. | | | 12 59 24 | 12 59 57 | o 33 + Petersburg. | | Mart.| 1. | 9 46 49 | o 37 + Philadelphia. | | | 14 57 57 | 14 57 21 | o 36 — Paris. Cl. | | | 15 58 20 | 15 58 15 | o 5 — Tyrnav. | | | 3. | 10 26 59 | o 5 + Tyrnav. | | | 8. | 17 54 32 | o 22 — Upsala. | | | 10. | 11 22 15 | o 19 — Paris. Cl. | | | 12 22 40 | 12 22 50 | o 10 + Tyrnav. | | | 13 13 25 | 13 13 52 | o 27 + Petersburg. | | | 17. | 13 32 17 | o 30 + Geneve. | | | 19. | 9 39 0 | o 4 — Petersburg. | | | 24. | 15 29 3 | o 0 Geneve. | | | 26. | 9 43 3 | o 13 + Paris. O. | | | 9 58 1 | 9 58 6 | o 5 + Geneve. | | | 10 43 56 | 10 44 12 | o 16 + Tyrnav. | | | 11 34 52 | 11 35 14 | o 22 + Petersburg. | | Apr. | 2. | 11 29 33 | o 52 + Greenw. d. | | | 12 42 43 | 12 42 36 | o 7 — Stockh. | | | 18. | 12 1 37 Em.| 12 1 14 | | | 25. | 8 56 50 | o 23 — Greenw. | | | 13 57 19 | 13 57 10 | o 17 — Philadelphia. | | | 27. | 8 35 11 | o 9 — Greenw. | | Mai. | 4. | 10 31 0 | o 15 + Paris. Cl. | | | 11 32 18 | 11 31 50 | o 4 — Paris. Cl. | | | 11 33 22 | 11 33 49 | o 28 — Tyrnav. | | | 11. | 12 16 46 | o 27 + Stockh. | | | 12 26 15 | 12 26 4 | o 0 Greenw. | | | | | o 11 — Paris. Cl. | Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis | Calculus | Diff. Calc. Observatorium | |------|---------------------|----------|--------------------------| | | M. D. h ' " | h ' " | | | 1768 | Mai. 20. | 8 49 54 - | 8 49 29 o 25 — Paris. Cl. | | | | 9 52 6 - | 9 52 22 o 16 + Stockh. | | | | 10 43 14 - | 10 43 44 o 30 + Paris. Cl. | | Jun. | 3. | 12 28 6 - | 12 28 19 o 13 + Greenw. | | | | 12 37 39 - | 12 37 37 o 2 — Paris. Cl. | | | | 8 50 16 - | 8 50 18 o 2 + Greenw. | | | | 10 0 23 - | 10 0 49 o 26 + Upsala. | | | | 10 2 32 - | 10 2 29 o 3 — Stockh. | | | | 10 43 27 - | 10 43 38 o 11 + Greenw. | | | | 10 53 43 - | 10 52 56 o 47 — Paris. Cl. d. | | Jul. | 5. | 9 8 5 - | 9 8 13 o 8 + Paris. Cl. | | 1769 | Jan. 17. | 18 37 12 Im. | 18 37 6 o 6 — Stockh. | | Feb. | 2. | 16 46 30 - | 16 46 19 o 11 — Tyrnav. | | | | 14 21 10 - | 14 20 57 o 13 — Norriton. | | | | 14 21 51 - | 14 21 49 o 2 — Philadelphia. | | | | 16 15 1 - | 16 14 59 o 2 — Norriton. | | | | 16 16 21 - | 16 15 51 o 30 — Philadelphia. | | Mart.| 20. | 16 9 9 - | 16 9 3 o 6 — Paris Cl. | | | | 12 25 7 - | 12 24 22 o 45 — Greenw. | | | | 13 34 34 - | 13 34 34 o 0 — Tyrnav. | | | | 13 36 54 - | 13 36 33 o 21 — Stockh. | | Apr. | 3. | 14 49 25 - | 14 49 49 o 24 + Norriton. | | | | 14 50 48 - | 14 50 41 o 7 — Philadelphia. | | | | 15 13 35 - | 15 13 1 o 34 — Lund. | | | | 15 32 30 - | 15 32 27 o 3 — Stockh. | | | | 16 46 0 - | 16 45 41 o 19 — Norriton. | | | | 11 14 37 - | 11 14 40 o 3 + Norriton. | | | | 11 15 49 - | 11 15 32 o 17 — Philadelphia. | | | | 16 16 8 - | 16 16 9 o 1 + Greenw. | | | | 16 25 39 - | 16 25 27 o 12 — Paris. Cl. | | | | 12 50 14 - | 12 50 1 o 13 — Paris. Cl. | | | | 13 52 41 - | 13 52 54 o 13 + Stockh. d. | Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis | Calculus | Diff. Calc. Observatorium | |------|---------------------|----------|--------------------------| | | M. D. | h ' " | h ' " | | 1769 | Apr. 28. | 14 35 17 | 14 36 7 | o 50 + Greenw. | | | | 14 45 15 | 14 45 25 | o 10 + Paris. Cl. | | | | 9 13 42 | 9 14 16 | o 34 + Paris. O. | | | | 10 16 38 | 10 17 9 | o 31 + Stockh. | | Mai. | 5. | 11 29 27 | 11 29 43 | o 16 + Norriton. | | | | 11 30 28 | 11 30 35 | o 7 + Philadelphia. | | | | 10 37 6 | Ein. | i 29 — Otaheite. d. | | | | 9 31 35 | | o 41 — Greenw. | | | | 9 41 1 | | o 49 — Paris. Cl. d. | | | | 10 43 7 | | o 2 — Stockh. | | | | 11 55 13 | | o 8 — Norriton. | | | | 11 34 52 | | o 24 — Paris. Cl. | | | | 12 37 42 | | o 21 — Stockh. | | | | 11 31 59 | | o 6 — S. Joseph. | | Jun. | 4. | 10 45 31 | | i 0 + Otaheite. | | | | 7 53 58 | | o 10 + S. Joseph. | | | | 10 11 32 | | o 5 — Norriton. | | | | 9 40 56 | | o 24 + Greenw. | | | | 9 50 41 | | o 3 — Paris. Cl. | | | | 9 51 9 | | o 33 — Paris. O. | | | | 10 51 45 | | o 6 + Upsala. | | | | 10 53 15 | | o 16 + Stockh. | | | | 7 8 16 | | o 12 + Otaheite. | | | | 12 5 1 | | o 0 — Norriton. | | | | 11 35 33 | | o 40 — Greenw. | | | | 14 33 36 | | o 1 + Otaheite. | | | | 9 1 43 | | o 14 + Otaheite. | | | | 11 40 56 | | o 15 + Norriton. | | | | 8 27 35 | | o 16 + Philadelphia. | | | | 9 6 41 | | o 22 + Tyrnav. | | | | 10 56 15 | | o 36 — Otaheite. | | | | 8 2 52 | | o 22 + S. Joseph. | Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |------|---------------------|-----------|--------------------------| | | M. D. | h / " | h / " | | 1769 | June 29. | 10 21 55 Em. | 10 21 25 | o 30 — Philadelph. | | | Jul. 1. | 9 50 24 | 9 50 31 | o 7 + Greenwich. | | | 6. | 11 0 59 | 11 0 43 | o 16 — Tyrnav. | | | Aug. 23. | 7 18 16 | 7 17 56 | o 20 — Otaheite. | | | 13. | 11 51 49 | 11 51 24 | o 25 — S. Joseph. | | | 24. | 10 12 28 | 10 11 41 | o 47 — Paris. Cl. | | 1770 | Jan. 29. | 7 15 48 | 7 15 14 | o 34 — Philadelph. | | | Mart. 16. | 17 52 18 Im. | 17 52 29 | o 11 + Tyrnav. | | | 25. | 17 2 47 | 17 2 16 | o 31 — Greenwich. | | | Mai. 3. | 14 37 14 | 14 36 33 | o 41 — Tyrnav. | | | 10. | 13 9 36 | 13 9 33 | o 3 — Tyrnav. | | | 15. | 14 45 45 | 14 46 20 | o 35 + Lund. | | | 26. | 15 5 43 | 15 5 46 | o 3 + Stockholm. | | | Jun. 4. | 13 2 18 | 13 3 9 | o 51 + Berlin. | | | 11. | 9 40 27 | 9 41 18 | o 51 + Tyrnav. | | | 20. | 12 35 22 Em. | 12 34 27 | o 55 — Greenwich. | | | Jul. 13. | 10 8 30 | 10 8 6 | o 24 — Stockholm. | | | 9 5 7 | 9 5 19 | o 12 + Greenwich. | | | 9 6 24 | 9 5 38 | o 46 — Chislehurst. | | | 9 59 15 | 9 59 1 | o 14 — Berlin. | | | 29. | 8 34 19 | 8 34 13 | o 6 — Tyrnav. | | | Aug. 5. | 9 19 41 | 9 19 57 | o 16 + Greenwich. | | | 9 20 42 | 9 20 16 | o 26 — Chislehurst. | | | 9 28 52 | 9 29 12 | o 20 + Paris. Cl. | | | 10 13 31 | 10 13 34 | o 3 + Berlin. | | | 10 30 25 | 10 30 6 | o 19 — Tyrnav. | | | 21. | 8 52 49 | 8 52 47 | o 2 — Tyrnav. | | | Sept. 13. | 8 15 14 | 8 14 46 | o 28 — Paris. Cl. | | 1771 | Mart. 28. | 16 45 22 Im. | 16 45 6 | o 16 — Paris. Cl. | | | Apr. 13. | 15 4 21 | 15 4 16 | o 5 — Paris. Cl. | | | Mai. 22. | 13 46 13 | 13 46 28 | o 15 + Geneve. | Vol. LXXVII. A a Observaciones Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis | Calculus | Diff. Calc. Observatorium | |------|---------------------|----------|--------------------------| | | M. D. | | | | | h ' " | h ' " | | | 1771 | Mai. 22. | 14 32 20 | Im. | | | 14 32 25 | o 5 + Tyrnav. | | | Jun. 7. | 11 44 57 | - | | | 11 44 53 | o 4 — Paris Cl. | | | 11 59 43 | - | | | | 11 59 50 | o 7 + Geneve. | | | 14. | 13 52 20 | - | | | 13 52 14 | o 6 — Geneve. | | | 14 22 4 | - | | | | 14 21 39 | o 25 — Berlin. | | | Jul. 23. | 14 5 38 | Em. | | | 14 4 58 | o 40 — Greenwich. | | | 25. | 9 44 15 | - | | | 9 43 51 | o 24 — Tyrnav. | | | Aug. 1. | 10 37 38 | - | | | 10 38 1 | o 23 + Paris Cl. | | | 10. | 8 3 49 | - | | | 8 3 38 | o 11 — Tyrnav. | | | 17. | 8 49 47 | - | | | 8 49 53 | o 6 + Greenw. | | | 8 51 0 | - | | | | 8 50 12 | o 48 — Chislehurst. | | | 9 14 12 | - | | | | 9 14 8 | o 4 — Geneve. | | | 10 1 47 | - | | | | 10 2 4 | o 17 + Stock. | | | Sept. 2. | 8 23 55 | - | | | 8 24 2 | o 7 + Tyrnav. | | | 8 26 14 | - | | | | 8 26 1 | o 13 — Stockholm. | | | 9. | 9 11 56 | - | | | 9 11 44 | o 12 — Greenw. | | | 9 12 18 | - | | | | 9 12 3 | o 15 — Chislehurst. | | | 25. | 7 37 43 | - | | | 7 37 24 | o 19 — Greenw. | | | 8 49 51 | - | | | | 8 49 35 | o 16 — Stockh. | | | Oct. 2. | 9 35 40 | - | | | 9 35 26 | o 14 — Greenw. | | | 9 35 56 | - | | | | 9 35 45 | o 11 — Chisleh. | | | 11. | 6 2 33 | - | | | 6 2 39 | o 6 + Greenw. | | | 6 3 16 | - | | | | 6 2 58 | o 18 — Chisleh. | | | 7 13 21 | - | | | | 7 12 47 | o 34 — Tyrnav. | | | Nov. 3. | 7 32 32 | - | | | 7 32 12 | o 20 — Tyrnav. | | | 19. | 5 52 27 | - | | | 5 52 34 | o 7 + Stockh. | | | 1772. Mai. 12. | 15 11 30 | Im. | | | 15 12 1 | o 31 + Pekin. | | | Jun. 9. | 14 57 33 | - | | | 14 57 14 | o 19 — Greenw. | | | 15 7 32 | - | | | | 15 6 32 | 1 0 — Paris Cl. | | | 15 28 20 | - | | | | 15 27 55 | o 25 — Perinaldo. | | | 25. | 13 9 17 | - | | | 13 18 43 | o 34 — Paris O. | Observationes Observationes comparatae primi satellitis Jovis. | Ann. | Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |------|---------------------|-----------|--------------------------| | M. D. | h ' " | h ' " | | | 1772. Jun. 25. | 13 40 9 Im. | 13 40 8 | o 1 — Perinaldo. | | | 14 20 1 - | 14 19 39 | o 22 — Tyrnav. | | | 15 22 54 - | 15 23 10 | o 16 + Pekin. | | Jul. 2. | 15 32 31 - | 15 32 27 | o 4 — Perinaldo. | | | 11 22 34 - | 11 22 33 | o 1 — Greenw. | | | 11 22 34 - | 11 22 52 | o 18 + Chislehurst. | | | 11 31 38 - | 11 31 49 | o 11 + Paris. O. | | | 11 31 57 - | 11 31 51 | o 6 — Paris. Cl. | | | 12 32 25 - | 12 32 45 | o 20 + Tyrnav. | | 18. | 13 25 10 - | 13 25 4 | o 6 — Paris. O. | | | 14 25 41 - | 14 25 59 | o 18 + Tyrnav. | | 27. | 9 38 2 - | 9 38 25 | o 23 + Chislehurst. | | | 9 47 28 - | 9 47 24 | o 4 — Paris. Cl. | | | 11 39 6 - | 11 39 20 | o 14 + Petersb. | | Aug. 3. | 11 32 48 - | 11 33 2 | o 14 + Chislehurst. | | | 13 33 40 - | 13 33 57 | o 17 + Petersb. | | 10. | 13 36 46 - | 13 37 10 | o 24 + Paris. O. | | | 13 37 11 - | 13 37 12 | o 1 + Paris. Cl. | | | 15 28 26 - | 15 29 8 | o 42 + Petersb. | | 21. | 14 23 21 Em. | 14 22 41 | o 40 — Pekin. | | 26. | 14 4 22 - | 14 4 18 | o 4 — Greenw. | | 28. | 9 26 55 - | 9 27 20 | o 25 + Berlin. | | | 9 44 5 - | 9 43 52 | o 13 — Tyrnav. | | 30. | 10 48 44 - | 10 48 31 | o 13 — Pekin. | | Sept. 4. | 11 23 38 - | 11 23 26 | o 12 — Lund. | | | 11 23 50 - | 11 24 21 | o 29 + Berlin. | | | 11 41 11 - | 11 40 53 | o 18 — Tyrnav. | | 8. | 7 15 19 - | 7 14 59 | o 20 — Pekin. | | 13. | 8 9 44 - | 8 9 38 | o 6 — Stockholm. | | 15. | 9 12 7 - | 9 12 29 | o 22 + Pekin. | | 20. | 9 47 54 - | 9 47 49 | o 5 — Lund. | A a 2 Observationes Observationes comparatæ primi satellitis Jovis. | Anni. Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |---------------------------|-----------|---------------------------| | M. D. | h ' " | h ' " | | 1772, Sept. 20. | 10 6 56 | Em. 10 7 16 | | | 11 9 47 | o 20 + Stockh. | | | 10 52 31 | o 19 + Pekin. | | | 12 2 52 | o 16 + Greenw. | | | 12 4 45 | o 26 + Upsala, | | | 12 50 41 | o 13 + Stockh. | | Oct. 4. | 7 28 53 | o 0 Chislehurst. | | | 8 13 17 | o 13 + Paris. O. | | | 8 30 12 | o 13 + Berlin. | | | 9 16 49 | o 10 — Tyrnav. | | | 9 17 13 | o 24 + Greenw. | | | 10 9 40 | o 19 + Chislehurst. | | | 10 10 13 | o 18 + Lund. | | | 10 27 31 | o 40 + Berlin. | | | 6 1 36 | o 6 — Tyrnav. | | | 11 13 59 | o 10 — Pekin. | | | 11 14 32 | o 12 + Greenw. | | | 6 36 57 | o 2 — Chislehurst. | | | 6 53 28 | o 2 + Berlin. | | | 7 58 20 | o 3 + Tyrnav. | | | 8 50 14 | o 10 — Pekin. | | | 9 54 21 | o 19 + Tyrnav. | | Nov. 9. | 6 19 6 | o 4 + Pekin. | | | 5 59 28 | o 15 — Pekin. | | | 8 13 54 | o 5 — Greenw. | | Dec. 2. | 6 29 46 | o 17 — Pekin. | | | 8 23 12 | o 5 — Pekin. | | | 5 15 3 | o 35 — Pekin. | | | 5 15 51 | o 24 — Lund. | | | 6 36 12 | o 17 — Berlin. | | 1773, Mai. 29. | 15 18 46 | o 36 — Pekin. | | | Im. 15 18 4 | o 42 — Perinaldo. d. | Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |------|---------------------|-----------|---------------------------| | | M. D. | h ' " | h ' " | | 1773 | Jun. 14. | 14 10 37 Im. | 14 10 45 | o 8 + Tyrnav. | | | 16. | 15 14 17 - | 15 14 13 | o 4 — Pekin. | | | 21. | 15 16 43 - | 15 16 58 | o 15 + Geneve. | | Jul. | 7. | 13 35 59 - | 13 36 23 | o 24 + Perinaldo. d. | | | 14. | 15 28 55 - | 15 28 45 | o 10 — Perinaldo. | | | 16. | 11 27 8 - | 11 27 40 | o 32 + Petersburg. | | | 23. | 11 19 22 - | 11 19 42 | o 20 + Greenw. | | | 30. | 11 50 22 - | 11 50 17 | o 5 — Perinaldo. | | Aug. | 6. | 13 44 28 - | 13 44 6 | o 22 — Perinaldo. | | | 15 14 40 - | 15 14 45 | o 5 + Petersburg. | | | 15 17 30 - | 15 17 13 | o 17 — Paris. Cl. | | | 15 17 36 - | 15 17 11 | o 25 — Paris. O. | | | 15 32 20 - | 15 32 10 | o 10 — Geneve. | | | 8. | 10 0 42 - | 10 0 53 | o 11 + Geneve. | | | 10 7 15 - | 10 7 13 | o 2 — Perinaldo. | | | 10 48 41 - | 10 48 49 | o 8 + Stockholm. | | | 11 37 37 - | 11 37 52 | o 15 + Petersb. | | | 15. | 11 41 5 - | 11 40 47 | o 18 — Paris. Cl. | | | 11 55 58 - | 11 55 44 | o 14 — Geneve. | | | 12 41 23 - | 12 41 41 | o 18 + Tyrnav. | | | 13 32 58 - | 13 32 43 | o 15 — Petersburg | | | 22. | 13 26 14 - | 13 27 3 | o 49 + Greenw. d | | | 15 28 20 - | 15 28 17 | o 3 — Petersb. | | | 24. | 9 8 24 - | 9 8 18 | o 6 — Stockholm | | | 15 41 22 - | 15 41 46 | o 24 + Pekin. | | | 26. | 10 10 31 - | 10 10 40 | o 9 + Pekin. | | | 29. | 15 32 41 - | 15 32 25 | o 16 — Paris. Cl. | | | 15 47 40 - | 15 47 22 | o 18 — Geneve. | | | 15 53 49 - | 15 53 42 | o 7 — Perinaldo. | | | 31. | 9 51 57 - | 9 52 12 | o 15 + Greenw. | | | 10 22 16 - | 10 22 47 | o 31 + Perinaldo. | Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis | Calculus | Diff. Calc. Observatorium | |------|--------------------|----------|--------------------------| | | M. D. | h ' " | h ' " | | 1773 | Aug. 31. | 11 2 7 | Im. 11 2 24 | o 17 + Tyrnav. | | | Sept. 7. | 12 18 35 | - 12 19 11 | o 36 + Perinaldo. | | | 9. | 14 2 56 | - 14 3 27 | o 31 + Pekin. | | | 14. | 14 9 8 | - 14 9 36 | o 28 + Geneve. | | | 15 46 14. | 15 46 35 | - | o 21 + Petersburg. | | | 16. | 9 27 0 | - 9 27 8 | o 8 + Stockholm. | | | 25. | 12 26 7 | - 12 26 27 | o 20 + Pekin. | | | 27. | 9 6 28 | Em. 9 6 30 | o 2 + Pekin. | | Okt. | 2. | 9 58 55 | - 9 58 41 | o 14 — Tyrnav. | | | 10 49 49. | 10 49 43 | - | o 6 — Petersburg. | | | 16. | 33 55 | - 16 34 8 | o 13 + Pekin. | | | 9. | 10 44 40 | - 10 45 13 | o 33 + Greenw. | | | 12 46 30. | 12 46 27 | - | o 3 — Petersburg. | | | 11. | 7 15 30 | - 7 15 36 | o 6 + Petersb. | | | 12 59 19. | 13 0 1 | - | o 42 + Pekin. | | | 13. | 7 28 57 | - 7 29 12 | o 15 + Pekin. | | | 16. | 12 50 34 | - 12 51 2 | o 28 + Paris. Cl. | | | 13 12 37. | 13 12 19 | - | o 18 — Perinaldo. | | | 18. | 7 19 48 | - 7 20 5 | o 17 + Paris. Cl. | | | 7 41 33. | 7 41 22 | - | o 11 — Perinaldo. | | | 8 20 52. | 8 20 59 | - | o 7 + Tyrnav. | | | 20. | 9 25 6 | - 9 25 33 | o 27 + Pekin. | | | 25. | 9 6 12 | - 9 6 50 | o 38 + Greenw. | | | 9 15 35. | 9 16 8 | - | o 33 + Paris. Cl. | | | 9 15 49. | 9 16 6 | - | o 17 + Paris. O. | | | 9 37 1. | 9 37 31 | - | o 30 + Perinaldo. | | | 10 17 19. | 10 17 21 | - | o 2 + Upsala. | | | 10 18 43. | 10 19 1 | - | o 18 + Stockholm. | | | 27. | 11 20 54 | - 11 21 27 | o 33 + Pekin. | | | 29. | 5 49 54 | - 5 50 20 | o 26 + Pekin. | | Nov. | 1. | 11 2 10 | - 11 2 25 | o 15 + Greenw. | Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |------|---------------------|-----------|---------------------------| | | M. D. | h ' " | h ' " | | 1773 | Nov. | | | | | 1. | 11 11 49 Em. | 11 11 43 | o 6 — Paris. Cl. | | | | 11 33 24 | 11 33 0 | o 24 — Perinaldo. | | | 3. | 6 23 58 | 6 23 58 | o 0 — Lund. | | | 26. | 6 12 30 | 6 13 3 | o 33 + Perinaldo. | | | | 6 35 2 | 6 35 13 | o 11 + Lund. | | | | 6 52 57 | 6 52 59 | o 2 + Upsala. | | | | 6 54 45 | 6 54 39 | o 6 — Stockh. | | | | 7 44 4 | 7 43 42 | o 22 — Petersburg. | | Dec. | 3. | 8 46 25 | 8 46 5 | o 20 — Upsala. | | | | 8 47 58 | 8 47 45 | o 13 — Stockh. | | | 10. | 9 27 59 | 9 28 15 | o 16 + Greenw. | | | 19. | 6 59 15 | 6 59 11 | o 4 — Tyrnav. | | 1774 | Jan. | 9 42 59 | 9 42 55 | o 4 — Paris. Cl. | | | 2. | 5 12 7 | 5 12 4 | o 3 — Tyrnav. | | | 4. | 6 4 24 | 6 4 10 | o 14 — Paris. Cl. | | | 11. | 7 7 2 | 7 7 3 | o 1 + Stockh. | | | 18. | 7 48 22 | 7 48 20 | o 2 — Greenw. | | Feb. | 3. | 6 15 33 | 6 15 8 | o 25 — Paris. Cl. | | | | 7 16 17 | 7 16 21 | o 4 + Upsala. | | | | 7 18 10 | 7 18 1 | o 9 — Stockh. | | | 19. | 5 38 58 | 5 38 41 | o 17 — Stockh. | | | 26. | 6 23 29 | 6 23 14 | o 15 — Greenw. | | Aug. | 4. | 12 32 38 Im. | 12 32 16 | o 22 — Tyrnav. | | | | 12 32 51 | 12 32 35 | o 16 — Upsala. | | | | 12 34 42 | 12 34 15 | o 27 — Stockh. | | | | 13 23 17 | 13 23 18 | o 1 + Petersburg. | | | 18. | 15 21 15 | 15 21 3 | o 12 — Paris. Cl. | | | 20. | 10 51 10 | 10 51 6 | o 4 — Upsala. | | | | 10 53 9 | 10 52 46 | o 23 — Stockh. | | | 27. | 12 46 32 | 12 46 44 | o 12 + Upsala. | | Sept. | 3. | 14 25 0 | 14 24 48 | o 12 — Lund. | Observationes Observationes comparatæ primi satellitis Jovis. | Ann. | Temp. Observationis | Calculus | Diff. Calc. Observatorium | |------|---------------------|----------|--------------------------| | | M. D. | h ' " | h ' " | | 1774 | Sept. 3. | 14 42 21 | Im. 14 42 15 | o 6 — Tyrnav. | | | | 15 33 29 | | o 12 — Petersburg. | | | | 15 28 31 | | o 24 — Greenw. | | | | 16 38 28 | | o 9 — Tyrnav. | | | | 9 57 14 | | o 1 — Greenw. | | | | 9 46 | | o 22 — Stockh. | | | | 58 36 | | o 9 — Petersb. | | | | 8 23 43 | | o 0 — Petersb. | | | | 13 49 53 | | o 13 — Greenw. | | | | 13 59 42 | | o 44 — Paris. Cl. | | Okt. | 3. | 15 46 19 | | o 32 — Greenw. | | | | 15 55 45 | | o 40 — Paris. Cl. | | | | 16 58 31 | | o 33 — Stockh. | | | | 10 24 45 | | o 37 — Paris. Cl. | | | | 11 25 9 | | o 7 — Tyrnav. | | | | 11 26 59 | | o 2 + Stockh. d. | | | | 12 16 5 | | o 1 — Petersb. | | | | 17 41 57 | | o 14 — Greenw. | | | | 12 20 25 | | o 25 — Paris. Cl. | | | | 7 50 7 | | o 1 — Upsala. | | | | 7 52 0 | | o 14 — Stockh. | | | | 14 16 20 | | o 48 — Paris. Cl. | | | | 8 35 0 | | o 3 + Greenw. | | | | 8 44 47 | | o 26 — Paris. Cl. | | | | 16 1 23 | | o 3 + Greenw. | | | | 6 10 47 | | o 12 + Stockh. | | Nov. | 11. | 17 19 3 | Em. 17 18 53 | o 10 — Lund. | | | | 12 5 2 | | o 23 — Tyrnav. | | | | 6 15 39 | | o 3 — Lund. | | | | 6 34 34 | | o 28 + Stockh. | | | | 12 56 42 | | o 21 + Paris. Cl. | Observationes Observationes comparatae primi satellitis Jovis. | Ann. | Temp. Observationis. | Calculus. | Diff. Calc. Observatorium. | |------|---------------------|-----------|--------------------------| | | M. D. | h ' " | h ' " | | 1774 | Nov. 22. | 8 27 22 | Em. 8 23 10 | o 48 + Stockh. | | | Dec. 6. | 11 9 25 | - 11 10 7 | o 42 + Paris. Cl. | | | | 12 11 9 | - 12 11 1 | o 8 — Tyrnav. | | | | 4 52 25 | - 4 52 47 | o 22 + Stockh. | | | | 11 3 48 | - 11 4 32 | o 44 + Greenw. | | | | 12 14 15 | - 12 15 3 | o 48 + Upsala. | | | | 12 16 11 | - 12 16 43 | o 32 + Stockh. | | | | 6 25 5 | - 6 25 17 | o 12 + Lund. | | 1775 | Jan. 23. | 6 48 55 | - 6 49 43 | o 48 + Tyrnav. | | | Feb. 15. | 5 53 2 | - 5 53 32 | o 30 + Greenw. | | | | 7 49 37 | - 7 49 59 | o 22 + Greenw. | | | | 8 42 39 | - 8 42 44 | o 5 + Lund. | | | | 9 0 6 | - 9 0 11 | o 5 + Tyrnav. | | | | 9 1 55 | - 9 2 10 | o 15 + Stockh. | | | Mart. 10. | 7 23 51 | - 7 23 53 | o 2 + Tyrnav. | | | | 8 11 7 | - 8 11 21 | o 14 + Greenw. | | | Jul. 15. | 14 42 36 | Im. 14 42 14 | o 22 — Greenw. | | | | 13 5 40 | - 13 5 46 | o 6 + Petersb. | | | Aug. 7. | 14 53 55 | - 14 53 26 | o 29 — Greenw. | | | | 13 18 25 | - 13 18 29 | o 4 + Petersb. | | | Sept. 1. | 11 38 30 | - 11 38 45 | o 15 + Petersb. | | | | 15 31 7 | - 15 30 54 | o 13 — Petersb. | | | | 11 6 50 | - 11 6 56 | o 6 + Stockh. | | | Oct. 1. | 11 50 3 | - 11 50 36 | o 33 + Greenw. | | | | 13 3 2 | - 13 2 47 | o 15 — Stockh. | | | | 9 27 23 | - 9 27 20 | o 3 — Stockh. | | | | 17 37 1 | - 17 36 25 | o 36 — Greenw. | | | Nov. 2. | 8 27 48 | - 8 27 35 | o 13 — Greenw. | | | | 7 54 22 | - 7 54 5 | o 17 — Stockh. | | | Dec. 11. | 10 6 5 | Em. 10 6 34 | o 29 + Stockh. | | | | 6 23 33 | - 6 23 37 | o 4 + Upsala. | Vol. LXXVII. Observationes comparatae primi satellitis Jovis. | Ann. | Temp. Observationis | Calculus. | Diff. Calc. Observatorium | |------|--------------------|-----------|--------------------------| | | M. D. | h ' " | h ' " | | 1775 | Dec. 20. | 6 24 55 | Em. 6 25 17 | 0 22 + Stockh. | | | 27. | 7 3 6 | - 7 4 9 | 1 3 + Greenw. | | | | 8 15 17 | - 8 16 20 | 1 3 + Stockh. | | 1776 | Jan. 12. | 6 26 48 | - 6 27 22 | 0 34 + Stockh. | | | 19. | 8 19 7 | - 8 19 51 | 0 44 + Stockh. | | | 26. | 10 12 15 | - 10 13 7 | 0 52 + Stockh. | | | 28. | 4 40 51 | - 4 41 32 | 0 41 + Stockh. | | Febr.| 2. | 12 6 20 | - 12 7 7 | 0 47 + Stockh. | | | 27. | 6 51 5 | - 6 51 33 | 0 28 + Stockh. |