Tebbutt, John

English

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89 2838 90 clp. 9 3 5 5 13 7 18 - -  5 2 1  Further Observations of Comet 1888. . . (Sawerthal) at  Windsor N. S. Wales. In a former communication I sent you positions of this comet for February 2 7  and 28. The following positions are the results of filar micrometer measures, the first for March 7 depending on the 41/2 inch telescope, and all the others on the 8 inch instrument. The refraction corrections, although amounting in no case to more than a small fraction of a second of arc, have been applied. The comet's nucleus was stellar and except when blurred by atmospheric conditions admitted of accurate observation. The tail may be traced by the unassisted eye as far as three degrees RA. app. 2 0 ~ 2 0 ~  I S ~  2 0  2 0  13.75 20 24 18.09 2 0  28 18.57 2 0  36 9.65 2 0  24 '7.93 2 0  39 38.3' 2 0  39 51.14 2 0  43 32.88 from the head. 9.787, 9.761, 9.770, 9.766, 9.729, 9.75711 9.739n 9.728, 9 . 7 7 0 ~  - 4r - 4 5 6 7 8 9 1 0  I 0  I 1  - I 28" 24' 19" 128 2 1  26.3 126 5 1  6.9 1 2 5  21 6.2 1 2 2  15 14.2 1 2 0  49 50.3 1 2 0  44 39.4 119 1 2  14.6 1 2 6  5 2  7.3 - 1ogp.A - 0~46542 - 7 22.11 +15 13.61 + 9 53.71 + I ]  46.48 - o 56.62 + I 20.73 1 7.90 - + 2' 5 l 1  - 6 48.6 + 4 32.6 - 5 31.8 - 8 5.3 - 4 33.3 - 8 16.4 - 3 5.5 1888 1 2 8 ~ 2 2 '  18" Anonymous. Appr. pos. 126 47 39.2 Stone 10840 128 28 18.5 Stone 10965 126 5 7  42.9 Cord. Z. 22.55  Yinds. M.T 8 9 I 0  I 1  Red. ad 1. app. 1 2 5 O  29' 1513 1 2 2  19 49..7 Stone 10897 Stone 11038 I 0.449 0.305 0 .42  I 0.42 I 0.45 9 0.412 0.644 0.490 0.494 - 2 1 ~  0' 1613 -10 40 29.4 - 4 32 1.8 - 1 2  9 1.2 - 6 5 2  37.1 ~ -1181 -4:'o -1.85 -3.6 -1.69 -4.5 - 1 . 7 2  -4.2 -1.67 -3.8 --1.65 -2.2 -1 .60 -1.9 -1.60 -1.9 -1.57 -1.4 B.A.C. 7343 Lal.42058 Lam,4367 B.A.C. 7451 Lam84345 March 2 3 3 4 6 7 I 8 2 - 1O48'38!'0 + o 23 14.9 + 8 3 33.5 +IO 48 40.2 W, 21h1050 W121h1225 W, 22h279 W1 22h408 Marzo I 6. Cometa visibile ad occhio nudo: coda lunga zO, diretta a Lal. 41529 a 1 6 ~ 4 1 ~ .  Nucleo un poco meno luminoso di I 8 Aquarii di 68. Nello spettro lineare del nucleo si distingue bene il rosso : traccie delle bande degli idrocarburi. A 17~48"' la cometa scompare per il chiarore dell' aurora. I RA. 1888.0 I NPD. 1888.0 1 Authority Osservazioni della Cometa 1888.. . (Sawerthd) f a t t e  d a g l i  A s t r o n o m i  Riccb e ,Z'onn a l l ' e q u a t o r i a l e  d i  P a l e r m o .  - * - I 2 3 4 5 6 7 8 9 - Cfr 5 5 6 4 4 5 3 - 2 I I 888 Red. ad 1. app. r.M.Palermo 1 Ih 25m49J I 7  26 35 1 7  '3 '9 1 7  2 1  28 16 59 43 1 7  5 28 16 16 1 7  1 7  5 47 16 43 36 - om3 7106 4-0 48.40 +o 48.01 t 2  46.30 + I  32.00 -0 9.83 -0  75.44 + 3  21-50  -5  19.75 + 0' 5614 - 8 48.2 -14 55.3 - I 15.1 + I 2  15.7 - 3 43.5 + 7 16.7 - 2 31.8 + 3 37.9 -1'539 -O:9 -1.23 --3.2 -1.25 -3.7 -1.16 -4.5 - 1 . 1 1  -5.0 -1.08 -5.7 -1.06 -6.2 -0.96 --7.9 -0.90 -8.4 Marzo 13 '9 23 25 2 7  29 Aprile 5 8 2 0  2 1 h  Zm30'550 2 1  2 2  22.28 2 1  25 32.28 2 1  35 13-05 2 1  41 30.34 2 1  47  49-09 2 1  54 5-30 2 2  1 5  28.83 2 2  2 4  21.02 -zoo 59' 20!'8 - 1 2  1 7  52.6 -10 5 5  28.4 - 4 19 5 1 . 1  I 5 2  27.2  +- 8 o 53.8 +IO 5 2  9.7 - 6 53 57.3 - -k 0 30 25.4 L u o g h i  m e d i i  de l le  s t e l l e  d i  c o n f r o n t o .  * I t(1888.0 B 1888.0 1 AutoritP a 1888.0 2 1 ~ 4 6 ~ 1 8 f 1 7  2 1  54 16.19 22  ' 5  45.23 22  2 0  54.42 3 21 30 53.28 4 2 1  34 26.20 5 2 1  38 45.15 

Further Observations of Comet 1888 … (Sawerthal) at Windsor N. S. Wales

https://zenodo.org/record/1632596/files/article.pdf

Further Observations of Comet 1888 … (Sawerthal) at Windsor N. S. Wales

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