Observationes Defectus Lunaris Grenovici Habitae in Ohservatorio Regio Februarij 11/21 1682. p. m. à Johanne Flamsteedio Math. Reg

Observationes Defectus Lunaris Grenovici habitae in observatorio Regio Februarii 1682. p.m. a Johanne Flamsteedio Math. Reg. Ut Teflis esset & particeps harum Observationum Vespera praecedente Grenovicum devenerat D. Halleius, aderat brevi postea Ds. Haltonus Amicus meus singularis & Geometra peritissimus, cum alijs nonnullis Mathefesos studiosis. Hora 8h. 01m Tubo pedum 16 Luna cepi Diametrum 6702 33' 25'', deinde distantiam Limbi ejus proximi a Limbo proximo Mareotidis 145-0' 43'' sed ejusdem Limbi Macula a Limbo Luna remotoire 6575' 32' 48''. Hora 8h 49m Oram Luna inferiorem Fumus capit inficere Eclipseis mox ingruentis prænuncius. Constitueramus Turbae vitandæ causâ seorsim observare, Recessit ergo Ds. Halleius cum Amanuensi meo Tho. Fabro ut per Telefocopia supra Sextantem Phasibus invigilarent, manente mecum D. Haltono. Tubo usus sum antedicto pedum 16 cum Micrometro, cujus ope nedum Umbræ ad Maculas appulsus sequentes, sed etiam Tempora, cum Obscuratio ad centrum Luna pertigerit, & cum Radius ejus arcus in Peripheria deficientes vel restitutos subtenderit, obtinui quibus medium derivari potest, forsan non minus accurate, quam ab Observatis Initio & Fine Immersione & Emerfione collatis. Hisce alias ejusdem Defectus Animadversiones Londini in Vico Basingenfi à D. Haynefio Tubo pedum 8 factas addidi tum propter earum cum nostris Consensum, cum ut inde innotescat quam non difficile sit accurate Lunaris Eclipseis Phases determinare, quicquid inexperti è contrario ediffrunt, si modo attenti sint, & necessarijs pauculis Instrumentis instructi Caelispices. ECLIPSIS ECLIPSIS LUNÆ Feb. 11. 1682. OBSERVATIONES Fulminus ad Oram Inferiorem. Nudis Oculis Vmbra Densa Penumbra Initium Medium Palus Mareotidis rectum Tota Palus recta Scuta pars Peripheriae obscurata Circulus intra Umbra Peripherite. M. div. Umbra stringit Sybonem Limbus primus mon is Cataractes vel Gassendi Oculus Deaconis Legebat Limbus primus Creta & Attic Attic totus rectus, Incipit Hiero Hierot Initium Cordice Medium Cordice Sina Mons Incipit Sina medium Totus Sina rectus Centrum Luna five Digiti VI Incipit Lacus Niger Major Medium Lacus Nigri Majoris Totus regitur Lacus Initium Besbici Medius Besbicus Totus Besbicus & stringit Pontum Euxinum Incipit Byzantium Incipit Hominius Carpathes Mons Severorum Apollonia Macra Mons Hercules Macra tota recta Mons Hercules totus Corocondometis Palus Per medium Lacum Hyperboreum superiorem Corocondometis tota recta Umbra per Montem Coragem Tempora Phasium per Horotogia Oscillatoria correcta | Grenovici in Observatorio | Londini | |---------------------------|---------| | Mibi. | D. Halleio. | Do. Haynefo. | | h. ' " | h. ' " | h. ' " | | 8. 48. 38 | 9. 13' 04 | 9. 12. 13 forte citius | | 9. 04. 08 | 14. 39 | 13. 48 | | 11. 44 | | | | 12. 32 | | | | 14. 02 | | | | 18. 10 | | | | 20. 10 | | | | 21. 01 | | | | 21. 09 | | | | 21. 32 | | | | 27. 58 | | | | 28. 22 | | | | 29. 48 | | | | 30. 46 | | | | 30. 48 | | | | 36. 38 | | | | 37. 10 | | | | 38. 10 | | | | 38. 04 | | | | 38. 48 | | | | 39. 58 | | | | 40. 36 | | | | 41. 40 | | | | 43. 48 | | | | 43. 42 | | | | 44. 36 | | | | 44. 13 | | | | 46. 58 | | | | 47. 22 | | | | 47. 50 | | | | 48. 30 | | | | 50. 24 | | | | 52. 44 | | | | 54. 26 | | | | 59. 10 | | | | 10. 00. 38 | | | | 19. 01. 17 | | | Stringi | Stringis Mæotida | Grenovici in Observatorio | Londini | |------------------|--------------------------|---------| | per Lacum Hyperboreum inferiorem | Mibh. | D° Halleio | D° Hayneffio | | per medium Insulae Majoris | h. | h. | h. | | Tota fæc. Mæotis tecta | 1. | 1. | 1. | | Sexta Pars Peripheriae lucida residua | 2. | 2. | 2. | | Immersio | 3. | 3. | 3. | | Emerso | 4. | 4. | 4. | | Sexta pars Peripheriae illuminata cum Limbo ro. Marcot. | 5. | 5. | 5. | | Medium Mareotidis | 6. | 6. | 6. | | Tota Marcotis illuminata | 7. | 7. | 7. | | Umbra per medium Porphiritidis | 8. | 8. | 8. | | Tonus Porphiritites recedens | 9. | 9. | 9. | | Circiana tota | 10. | 10. | 10. | | Stringis Sinum Sybonis | 11. | 11. | 11. | | Cataractes Sybonis, vel Gessendus totus | 12. | 12. | 12. | | Hierax incipit | 13. | 13. | 13. | | Aina incipit Emergere | 14. | 14. | 14. | | per medium Lacus Nigri Majoris | 15. | 15. | 15. | | per medium Athos | 16. | 16. | 16. | | Alna tous rectus | 17. | 17. | 17. | | Creta illuminatur | 18. | 18. | 18. | | Sina incipit | 19. | 19. | 19. | | Sinæ medium | 20. | 20. | 20. | | Sixa tota | 21. | 21. | 21. | | Medium Besicti | 22. | 22. | 22. | | Centrum Lune, five Digiti VI recedit | 23. | 23. | 23. | | Per medium Lacum Hyperboreum superiorem | 24. | 24. | 24. | | Umbra per medium Byzantii | 25. | 25. | 25. | | Byzantium extra | 26. | 26. | 26. | | Macra tota | 27. | 27. | 27. | | Insula Apolloa tota & Horminius | 28. | 28. | 28. | | Lacus Hyperboreus inferior | 29. | 29. | 29. | | Mons' Hercules | 30. | 30. | 30. | | Medium Corocondomutidis ad Umbrae | 31. | 31. | 31. | | Mons' Covax | 32. | 32. | 32. | | Mæotis incipit illustrari | 33. | 33. | 33. | | Mæotis tota recedit | 34. | 34. | 34. | | Sexta pars Peripheriae obscura residua | 35. | 35. | 35. | | Media Insulae Majoris Caspii | 36. | 36. | 36. | | Tota Insula recedit | 37. | 37. | 37. | | Dubius Finis | 38. | 38. | 38. | | Finis certè | 39. | 39. | 39. | Ingenium! Ingruente Eclipsi Distantias Lunæ a Fixis Sectante ceperant D. Halleius cum Tho. Fabro sequentes. | Tempora per hor. correct. | Distantia | |--------------------------|-----------| | h. 1. 11. | 0. 1. 11 | | 8. 53. 07 Limbi Lunæ remotioris a Regulo | 8. 05. 20 | | 55. 07 repet. | 8. 06. 20 | | 9. 02. 34 Limbi Lunæ rem. a lucid. in Lumbis | 14. 58. 15 | | 4. 18. repet. | 14. 57. 55 | | 8. 42 Limbi Lunæ remot. a Regulo iterum | 8. 12. 50 | Luna in Umbra penitus merita D. Halleius mecum. | Tempora per hor. correct. | Distantia | |--------------------------|-----------| | 10. 19. 21 Limbi Lunæ proximi a Regulo | 8. 13. 30 | | 11. 38. 06 repet. | 9. 23. 50 | | 41. 48 Limbi Lunæ remoti a Regulo | 9. 25. 35 | & finita Eclipse | Tempora per hor. correct. | Distantia | |--------------------------|-----------| | 12. 52. 00 Limbi remotioris a Regulo iterum | 9. 58. 20 | | 55. 10 denuò | 10. 00. 00 |