Zenith distances observed with the mural circle, at the Royal Observatory, Cape of Good Hope, and the calculation of the geocentric South Polar distances.

Date:: 1837

Credit: Zenith distances observed with the mural circle, at the Royal Observatory, Cape of Good Hope, and the calculation of the geocentric South Polar distances. Source: Wellcome Collection.

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$Calculation of Geocentric South Polar Distances. Sec. of Microm. appa- rent Thermometer. Apparent Zenith Barom. Refraction. Parallax. for Semi- Geoc. S. P. D. of NAME OF STAR opposite No. Distance. diameter. Center. Point. o Limb. ASC or < ca planet. a o / a Inch. 0 O O 1 n / n r 1 tt 0 t tt 5-24 -18 40 5-77 30-124 68-2 63-6 61-8 37 23 31-75 807 Canopus R. -18 40 3 85 liy zo 37 23 33-67 807 Canopus. 3-67 17 25 54-10 17-88 73 30 8-73 838 Sirius R. 17 25 52-87 73 30 7-50 838 Sirius. 4-96 7 47 37-65 -117 68-2 63-6 7-79 63 51 42-19 883 5 Canis Maj. R. 7 47 38-27 63 51 42-81 883 ^ Canis Majoris. • 4-59 4 56 38-57 -117 68-2 63-6 4-92 61 0 40-24 915 t; Canis Maj. R. 4 56 38-45 61 0 40-12 915 T] Canis Majoris. -56 29 22*35 -114 68-2 63-5 1 25-73 -0 26 51-33 B Octantis SP. 1 19 51-48 •096 68-0 63-2 1-32 57 23 49-55 1070 a Pix. Naut, 82 29 38-49 6 46-31 138 40 21-55 1092 t Ursee Majoris. 4-70 -8 50 25-74 •087 68-0 63-2 61-2 8-85 47 13 22-16 1114 X Argus 11. -8 50 25-64 47 13 22-26 1114 X Argus, 86 8 55-97 •083 67-8 63-2 61-2 1152 d Ursae Majoris. 4-70 -7 22 49-67 •078 67-6 63-0 61-5 7-37 48 40 59-71 1223 Argus in Velis R. -7 22 49-57 48 40 59-81 1223 Argus in Velis. 5-68 -24 53 14-83 •074 67-8 63-0 61-5 26-39 31 10 15-53 1281 t] Argus R. -24 53 12-77 31 10 17-59 1281 7j Argus. 4-64 11 59 27-59 •080 67-5 63-0 12-09 68 3 36-43 1319 Hyd.etCrat. R. 11 59 27-57 68 3 36-41 1319 Hydrae et Crat. 0 55 49-13 •080 67-5 63-0 0-92 56 59 46 80 1378 Hydr. et Crat. 4*19 11 25 59-93 •083 67-5 64-0 11-49 67 30 8-17 1448 /3 Corvi R. 11 25 59-01 67 30 7-25 1448 /3 Corvi. 5-36 -25 38 28-67 •092 68-0 67-6 27-09 30 25 0-99 1596 /3 Centauri R. -25 38 27-25 30 25 2-41 1596 /3 Centauri. 5-38 -26 13 7-29 -26 12 55-43 •100 68-2 69-4 27-70 29 50 21-76 29 50 33-62 1654 a ’ & ’ Centauri R. -26 13* 5-64 -26 12 54-18 29 50 23-41 29 50 34-87 1654 a' & * Centauri. 5-07 7 51 55-85 30-104 69-0 74-5 7-70 63 56 0-30 1885 Antares R. 7 51 56-69 63 56 114 1885 An tares. 11 1 13-69 30-102 70-0 76-4 69-0 10-94 1-64 16 17-30 66 49 2-44 o 10 28 41 24 10-39 1-56 66 49 4-12 © (3-65) 11 36 58-83 11 36 56-83 •100 70-3 76-0 11-42 1-56 67 41 5*44 67 41 3-44 5 R. § -0 15 49-55 •075 70-0 66-5 65-0 0-26 55 48 6-94 482 X Eridani. 49 11 46-23 •078 70-0 66-5 65-5 1 5-37 105 16 48-35 515 r/Tauri. 49 15 6-42 1 5-49 105 20 8-66 517 Tauri. 56 48 41-61 •074 69-4 66-5 1 26-14 4-10 112 54 0-40 Ceres. 74 42 46-92 3 23-52 130 50 7-19 582 ( Aurigae. 74 53 15-00 •075 69-0 66-4 3 25-92 131 0 37-67 588 T] Aurigae, 79 40 45-19 5 0-16 135 49 42-10 611 Capella. -56 46 50-74 •077 69-0 66-0 1 26-15 -0 44 20-14 cr Octantis SP. 4-07 15 59 15-66 •072 69-0 66-0 16-21 72 3 28-62 673 a Leporis R. 15 59 14-50 72 3 27-46 673 a Leoporis. -0 13 45-18 0-23 55 50 11-34 699 a Columbae, 4-71 -1 53 49-14 1-87 54 10 5-74 732 jSColumbae R. -1 53 49-02 54 10 5-86 732 (3 Columbae. -1 22 7-49 1-35 54 41 47-91 746 y Columbae. -1 9 16-50 1-14 54 54 39-11 787 K Columbae. 6-14 -18 40 6-12 37 23 31-51 807 Canopus R. -18 40 3-15 19-12 37 23 34-48 807 Canopus. 4-09 17 25 54-14 30-072 69-0 65-8 64-0 17-77 73 30 8-66 838 Sirius R. 17 25 53-02 73 30 7-54 838 Sirius. Coincidence of Micrometer Wire with fixed Wire, =20M62 One revolution =40^.335. Correction for Runs =-2^,35 Adopted Zenith Point to Sirius, on the 29*'*, = n CO o O . 04.28 From Sirius, =306°. 04'.04.65 Assumed Co-latitude = 56°. 03'. 56.75 •Oo$