Observationes Coelestes Britannicae, Grenovici in Observatorio Regio Habitae, anno MDCCXIII

### III. OBSERVATIONES COELESTES BRITANNICÆ, Grenovici in Observatorio Regio habitæ, anno MDCCXIII. #### Observationes SATURNI. | Temp. per Horolog. | Tempora correcta | Die Solis, Januarii 25. | Distantiae a Vertice | |-------------------|-----------------|-------------------------|----------------------| | h. | h. | Geminorum περπερι transit | 28° 13' 20" | | 8 30 15 | 8 28 | Pes Castoris n transit | 28° 54' 50" | | 8 41 7 | 38 57 | Calx ejusdem sive μ transit | 28° 50' 40" | | 8 49 8 | 8 46 58 | Leonis ψ Bayer transit | 36° 9' 30" | | 12 10 49 | 12 8 39 | Leonis ν transit | 37° 40' 30" | | 12 25 24 | 23 14 | Saturni centrum transit | 36° 51' 45" | | 12 34 21 | 32 11 | Cor Leonis transit | 38° 7' 00" | | 12 35 44 | 12 33 34 | Ascensio rect. h 147 55 10 | | | | Dist. a Polo Bor. 75 23 55 | | | | Longitudo Ω 25° 8' 15" | | | | Latitudo Bor. 1° 31' 27" | Z z Die | Temp. per Horolog. | Tempora correcta | Die Jovis Februarii 5. 1713. | Distantiæ a Vertice. | |-------------------|-----------------|-------------------------------|---------------------| | h. | h. | | | | 11 20 52 | 11 14 10 | Leonis ξ Bayero transit | 38 55 20 | | 30 9 | 23 27 | Leonis o transit | 40 17 30 | | 35 18 | 28 36 | Leonis 16ta Cat. Brit. transit| 38 21 20 | | 47 8 | 40 26 | Leonis v transit | 37 40 30 | | 52 42 | 46 00 | Saturni centrum transit | 36 32 50 | | 11 57 25 | 50 43 | Cor Leonis transit | 38 7 5 | | 12 0 35 | 53 53 | Leonis 31ma transit | 36 42 50 | | 5 40 11 58 | 58 58 | Leonis 34ta transit | 36 19 30 | | 12 10 50 | 12 4 | Leonis 38va transit | 35 3 5 | | | | Ascensio recta h 147 4 45 | | | | | Distantia a Polo 75 5 00 | | | | | Longitudo 24 14 8 | | | | | Latitudo Bor. 1 32 16 | | Die Veneris Februarii 6. | 8 22 53 | 8 14 43 Lucidus pes Pollucis, π tr. | 34 52 00 | |---------|-----------------------------------|----------| | 11 29 22 | 11 21 12 Leonis ψ transit | 36 9 15 | | 11 43 58 | 11 35 48 Leonis v transit | 37 40 30 | | 11 49 10 | 11 41 Saturni centrum transit | 36 31 00 | | | Ascensio recta h 146 59 0 | | | | Distantia a Polo 75 3 10 | | | | Longitudo 24 8 17 | | | | Latitudo Bor. 1 32 8 | | Die Mercurii Febru. 18. | 11 0 15 | 10 53 Saturni centrum transit | 36 12 00 | |---------|--------------------------------|----------| | 11 8 53 | 11 1 38 Cor Leonis transit | 38 7 5 | | 11 17 7 | 11 9 52 Leonis 34ta Cat. Brit. transit | 36 19 35 | | 11 22 16 | 11 15 Ejusdem 38va transit | 35 3 55 | | | Ascensio recta h 146 5 00 | | | | Distantia a Polo 74 44 10 | | | | Longitudo 23 12 47 | | | | Latitudo Bor. 1 32 41 | | | Temp. per Tempora Horolog. correcta. | Die Lunæ Martii 2. 1713. | Distantia a Vertice | |-------------------------------------|--------------------------|-------------------| | h. | | | | 6 30 9 52 | Leonis transit | 36 9 3c | | 19 27 10 5 00 | Saturni centrum transit | 35 55 2c | | 31 21 16 54 | Cor Leonis transit | 38 7 5 | | 34 31 20 4 | Leonis 3ima transit | 36 42 50 | | 10 39 35 10 25 | Leonis 34ta transit | 36 19 40 | | | Ascensio recta h 145 16 00| | | | Distantia a Polo 74 27 30| | | | Longitudo 22 22 40 | | | | Latitudo Bor. 1 3 52 | | Die Martis Aprilis 7. | 7 43 1 | 7 41 15 | Leonis transit | 36 9 25 | |---------|---------|----------------|--------| | 50 46 | 7 49 00 | Saturni centrum transit | 35 31 10 | | 57 35 | 55 50 | Leonis v Bayero transit | 37 40 20 | | 8 6 39 | 8 4 53 | Leonis in collo n transit | 33 19 25 | | 16 7 | 14 21 | Ejusdam 34ta Cat. Br. transit | 36 19 30 | | 8 21 17 | 8 19 31 | Ejusdem 38va transit | 35 3 50 | | | | Ascensio recta h 143 57 45 | | | | | Distantia a Polo 74 3 15 | | | | | Longitudo 21 3 32 | | | | | Latitudo 1 31 20 | | Die Mercurii Aprilis 8. | 7 47 43 | 7 46 00 | Saturni centrum transit | 35 31 15 | |---------|---------|-------------------------|----------| | 54 34 | 52 51 | Leonis v transit | 37 40 20 | | 8 3 37 | 8 1 54 | Leonis n transit | 33 19 20 | | 13 4 | 11 28 | Leonis 34ta transit | 36 19 35 | | 8 18 14 | 8 16 31 | Leonis 38va transit | 35 3 45 | | | | Ascensio recta h 143 57 30 | | | | | Distantia a Polo 74 3 20 | | | | | Longitudo 21 3 20 | | | | | Latitudo 1 31 10 | | | | | Saturno pene stationario | | Die | Temp. per Horolog. | Tempora correcta | Die Jovis Novemb. 5. 1713 | Distantiae a Vertice | |-------------------|-----------------|---------------------------|---------------------| | h. | h. | Leonis π in genu sequitur transit | 42° 4' 0" | | 18 22 00 | 18 15 37 | Cor Leonis transit | 38° 7' 5" | | 30 8 | 23 45 | Leonis in Axilla ρ transit | 40° 42' 0" | | 54 35 | 48 12 | Leonis in ventre l transit | 39° 25' 15" | | 19 11 5 | 19 4 42 | Saturni centrum transit | 42° 15' 40" | | 19 26 23 | 19 20 00 | Ascensio rect. h 162 23 20 | | | | | Distantia à Polo 80 43 00 | | | | | Longitudo ℓ 10 13 40 | | | | | Latitudo Bor. 1 39 37 | | Observationes JOVIS. Anno MDCCXIII. | Temp. per Horolog. | Tempora correcta | Die Solis Augusti 9. | Distantiae a Vertice | |-------------------|-----------------|----------------------|---------------------| | h. | h. | Aquarii λ in effusione Aqua transit | 60° 32' 5" | | 12 40 4 | 12 37 27 | Jovis centrum transit | 60° 48' 35" | | 12 48 37 | 12 46 | Aquarii 73ta Cat. Brit. prima ad h transit | 60° 46' 20" | | 12 52 36 | 12 49 59 | Aquarii in aqua χ transit | 60° 49' 10" | | 13 4 21 | 13 1 44 | Ascensio rect. χ 341 33 5 | | | | | Dist. a Polo Bor. 99 21 40 | | | | | Longitudo ℗ 9 26 00 | | | | | Latitudo Aust. 1 25 8 | | | Temp. per Horolog. | Tempora correcta | Die Lunæ Augusti 1713. | Distantiæ a Vertice. | |-------------------|-----------------|------------------------|---------------------| | h. | h. | Aquarii transit | 60° 32' 50" | | 12 36 21 | 12 33 55 | Jovis centrum transit | 60° 52' 00" | | 12 44 26 | 12 42 00 | Aquarii transit | | | 12 48 53 | 12 46 27 | Alcen. rect. χ 341° 26' 5" | | | | | Distantia a Polo 99° 25' 5" | | | | | Longitud. Jov. χ 9° 18' 17" | | | | | Latitudo Aust. 1° 25' 40" | | Die Lunæ Octobris 26. | 7 29 16 | 7 28 42 | Aquarii in Clune transit | 63° 34' 40" | |---------|---------|--------------------------|-------------| | 7 36 34 | 7 36 | Jovis centrum transit | 63° 00' 5" | | 8 14 34 | 8 14 | Aquarii prima ad ψ transit | 62° 5' 20" | | 8 17 45 | 8 17 | Aquarii sequens ad ψ transit | 62° 37' 5" | | | | Ascensio recta χ 335° 41' 30" | | | | | Distantia a Polo 101° 33' 20" | | | | | Longitudo Jovis χ 3° 16' 00" | | | | | Latitudo Aust. 1° 19' 8" | | Die Martis Octob. 27. | 7 25 40 | 7 23 34 | Aquarii Clunis transit | 63° 34' 35" | |---------|---------|--------------------------|-------------| | 7 33 | 7 31 | Jovis centrum transit | 62° 59' 15" | | 8 11 00 | 8 08 | Aquarii prima ad ψ transit | 62° 5' 15" | | 8 14 10 | 8 12 | Sequens ad ψ transit | 62° 37' 10" | | | | Ascensio recta χ 335° 43' 20" | | | | | Distantia a Polo 101° 32' 30" | | | | | Longitudo χ 3° 17' 58" | | | | | Latitudo Aust. 1° 19' 00" | | Die Jovis Octob. 29. | 7 18 29 | 7 15 19 | Aquarii transit | 63° 34' 40" | |---------|---------|---------------------------|-------------| | 26 10 | 7 23 | Jovis centrum transit | 62° 57' 20" | | 8 3 47 | 8 0 37 | Prima ad ψ transit | 62° 5' 20" | | 6 55 | 8 3 45 | Sequens ad ψ transit | 62° 37' 10" | A a a Ascen- Die Jovis Octob. 29, Ascensio recta \( x = 335 \) 47 45 Distantia a Polo \( 10^1 \) 30 35 Longitudo Jov. \( x = 3 \) 22 41 Latitudo Aust. \( 1 \) 18 49 Observationes MARTIS. Anno MDCCXIII. | Temp. per Horolog. | Tempora correcta. | Die Mercurii Feb. 18. 1713. | Distantiae a Vertice | |--------------------|------------------|-------------------------------|----------------------| | h. | h. | Leonis in poplite \( \tau \) transit | 47 2 15 | | 12 28 38 | 12 21 20 | In ancone Alae \( \alpha \beta \) transit | 48 5 40 | | 12 51 6 | 12 43 48 | Virginis \( \text{roma} \) Cat. Brit. \( r \) tr. | 47 57 40 | | 13 10 21 | 13 3 3 | Martis centrum transit | 47 2 5 | | 13 13 18 | 13 6 00 | In cervice Virginis \( c \) transit | 46 33 30 | | 13 21 8 | 13 13 50 | Asc. rect. Martis 179 29 20 | | | | | Distantia à Polo 85 34 35 | | | | | Longitudo \( \alpha \) 27 46 00 | | | | | Latitudo Bor. 3 51 10 | | Die Martis Martii 3. | h. | h. | In vertice Virginis \( \nu \) transit | 43 20 00 | |--------------------|------------------|---------------------------------------|----------| | 11 55 52 | 11 53 | Martis centrum transit | 45 14 20 | | 12 4 50 | 12 2 00 | In vultu Virginis \( \pi \) transit | 43 15 25 | | 10 54 | 8 | Undecima Virginis \( s \) transit | 44 3 30 | | 20 8 | 17 18 | Virginis 16. in Cervice \( c \) tr. | 46 33 25 | | 12 30 25 | 27 35 | Virginis 17ma Cat Br. transit | 44 33 45 | | 12 32 37 | +2 29 47 | Asc. rect. Martis 175 1 15 | | | | | Dist. a Polo Bor. 83 46 45 | | | | | Longitudo \( \alpha \) 22 57 33 | | | | | Latitudo Bor. 3 43 37 | | | Temp. per Horolog. | Tempora corrigta. | Die Martis Aprilis 7. 1713. | Distantiae a Vertice | |-------------------|------------------|----------------------------|---------------------| | h. | h. | | | | 9 4 47 | 9 3 10 | Sub Ventre Leonis χ transit | 42 35 25 | | 9 17 37 | 9 16 00 | Martis centrum transit | 42 42 50 | | 9 38 10 | 9 36 33 | Prima Virg. Cat. Br. ω transit | 41 44 50 | | 9 45 00 | 9 43 23 | Borea in Vertice ψ ε transit | 41 37 15 | | | | Asc. rect. Martis 165 45 40 | | | | | Distantia a Polo 81 15 10 | | | | | Longit. Martis ρ 13 30 40 | | | | | Latitudo Bor. 2 26 31 | | Die Mercurii Aprilis 8. | 9 1 44 | 9 0 29 | Leonis χ transit | 42 35 30 | | 9 14 15 | 9 13 00 | Martis centrum transit | 42 43 40 | | 9 35 7 | 9 33 52 | Virginis ω transit | 41 44 55 | | 9 41 58 | 9 40 43 | Virginis ε transit | 41 37 15 | | | | Asc. rect. Martis 165 41 00 | | | | | Distantia a Polo 81 16 00 | | | | | Longitud. Martis ρ 13 26 45 | | | | | Latitudo Bor. 2 23 55 | | Die Veneris Maii 1. | 7 55 9 | 7 50 00 | Martis centrum transit | 44 17 30 | | 8 18 12 | 8 13 3 | In Vertice Virginis ν transit | 43 20 00 | | 8 33 14 | 8 28 5 | In Vultu Virginis π transit | 43 15 30 | | | | Asc. rect. Martis 166 59 40 | | | | | Distantia a Polo 82 49 50 | | | | | Longitudo ρ 15 15 00 | | | | | Latitudo Bor. 1 27 40 | | A a a z Die | Temp. per Horolog. | Tempora correcta | Die Saturni Maii 1713 | Distantia a Vertice | |-------------------|-----------------|----------------------|--------------------| | h | h | | | | 7 52 45 | 7 47 00 | Martis centrum transit | 44 24 20 | | 8 15 7 | 8 9 22 | Virginis ν transit | 43 20 5 | | 8 30 8 | 8 24 23 | Virginis π transit | 43 15 25 | | | | Asc. rect. Martis 167 10 00 | | | | | Distantia a Polo 82 56 40 | | | | | Longitudo 15 27 5 | | | | | Latitudo Bor. 1 25 20 | | Observationes LUNÆ. Anno MDCCXIII. | Die Solis Januarii 25. | |------------------------| | 8 9 33 | 8 7 23 | Telescopica a transit | 28 26 20 | | 8 15 5 | 8 12 55 | Tauri 123 ia Cat. Brit. transit | 27 2 30 | | 8 20 20 | 8 18 10 | Lunæ limbus præced. transit, centro a Vertice | 27 32 40 | | 8 21 23 | 8 19 13 | Lunæ centrum transit limbo remoto a Vertice | 27 47 40 | | 8 22 52 | 8 20 42 | Lunæ cuspis Bor. a Vertice | 27 17 40 | | 8 30 15 | 8 28 5 | Geminorum περιστροφή transit | 28 13 20 | | 8 41 7 | 8 38 57 | Pes Castoris n transit | 28 54 50 | | 8 49 8 | 8 46 58 | Calx ejusdem μ transit | 28 50 49 | | | | Asc. rect. cent. 84 26 55 | | | | | Dist. a Polo visa 66 4 40 | | | | | Sed adhibit Paral. 65 39 50 | | | | | Longit. Lunæ π 24 56 30 | | | | | Latitudo Bor. 0 57 00 | | | Temp. per Horolog. | Tempora correcta | Die Lunæ Januarii 26. 1713 | Distantiae a Vertice | |-------------------|-----------------|----------------------------|---------------------| | h. | h. | Propus transit | 28° 13' 30" | | 8 26 41 | 8 24 36 | Pes Castoris n transit | 28° 54' 50" | | 8 37 31 | 8 35 26 | Calx Castoris µ transit | 28° 50' 40" | | 8 45 31 | 8 43 26 | Lunæ limbus praecedens | 28° 45' 00" | | 9 9 43 | 9 7 38 | transit, centro a Vertice | | | 9 10 50 | 9 8 45 | Lunæ centrum transit limbo | 29° 0' 5" | | 9 12 30 | 9 16 25 | remoto a Vertice | 28° 30' 10" | | 9 27 50 | 9 25 45 | Lunæ cuspis Bor. a Vertice | 28° 26' 10" | | 9 42 44 | 9 40 39 | orum 46ta Cat. Br. transit | 28° 59' 30" | | | | orum in Inguine d transit | | | | | Asc. rect. cent. D. 97 43' | 50" | | | | Dist. a Polo vis. 67 17' | 5" | | | | Adhibita Parallaxis 66 51' | 15" | | | | Longit. Lunæ 7 6 18" | | | | | Latitudo Aust. 0 8 48" | | **Observationes SATELLITUM JOVIS.** Die Veneris Octob. 30. 6 56 3° 6' 52" 35" Quartus Satelles visus est emergens ab umbra, diametro Jovis distans a tertio ei proximo ad dextram, Tubo scil. octo pedum. 7 4 00' 7 00" Clare explenduit, & linea ducta a proximo illo per centrum Jovis emergentem reliquit ad Austrum, situ scilicet inverso. 7 36 3° 1' 7 32" 30" Pegasi µ transit per planum Arcus meridionalis. Die Saturni Novemb. 7. 7 13 2° 17' 5 00" Secundus Satelles emergebat, vel potius emergere incipiebat. Tubo octo pedum 9 5 11' 8 57" 00" Piscium δ in Lino australi transit. N.B. N.B. Stella illa Telescopica a qua die Januarii 25° Lunam praecepsit, Ascensionem rectam tunc habuit 81° 28' 3", & distabat a Polo 66° 58' 20", unde fit Longitudo ejus 22° 9' 3" cum Latitudine Australi 0° 13' 3". Hac autem est ea ipsa stella ad quam applicabatur Jupiter in Statione secunda, anno 1634 Februarii 6, eamque non nisi tribus sui corporis diametris ad Austrum reliquit, observante Gassendo: ut habetur inter Observata ejus pag 174. Et ad eandem Mars observatus est Septembris 6to anno 1644 mane, ut videre est in Prolegomenis Selenographiae Hevelianae pag. 65 & Fig. 1. Verum multum usui erit, ad accuratam Nodi Jovis determinationem, ejusque motus, si modo inter stellas fixas planum orbitae Jovialis non hæreat immobile. Etenim post decursum 83 annorum, quibus Jupiter satis accurate septem absoluit periodos, anno solis 1717. Januarii 10. mane, Planeta stellam illam corporaliter teget vel saltem stringet, spectaculo quidem raro neque haec tenus quod sciam Astronomis in Jove concedo. Stella autem ipsa, etiam Telescopica vocetur, sudo caelo & absente Luna inermis oculi aciem non fugit; comitemque habet sequentem ad Austrum, & semidiametro Solis cireiter distantem, apud quam conspicetur Jupiter arctissime conjunctus. Die vicesimo Julii anni proximi 1716 mane. IV. An Account of an Experiment made by Dr. Brook Taylor assisted by Mr. Hawkesbee, in order to discover the Law of the Magnetical Attraction. By Order of the Royal Society Mr. Hawkesbee and my self made an Experiment with the great Loadstone belonging to the Royal Society, in order to discover the Law of the Magnetical Attraction; and not long after