ELEMENTS OF COMET b, 1897Author(s): Tracy CrawfordSource: Publications of the Astronomical Society of the Pacific, Vol. 9, No. 59 (December 1,1897), p. 234Published by: The University of Chicago Press on behalf of the Astronomical Society of the PacificStable URL: http://www.jstor.org/stable/40671087 .

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234 Publications of the

ELEMENTS OF COMET ¿, 1897.

By R. Tracy Crawford.

From observations made at the Lick Observatory and tele- graphed to the Students' Observatory by Professor J. M. Schae- berle, Acting Director, I have computed the following sets of parabolic elements for Comet a, 1897. The first set, from observa- tions by Mr. Perrine on October 16th and 17th, and by Professor Hussey on October 18th, is: -

T= 1897 Dec. 8.86570 G. M. T. ** =

69O35'39^5)MeanE inox

II 66 I 6 41 2I'°

.4 Ofl897«o w = 66 6 41 .4 j q= 1-355513

Representation of middle place - A X cos ß = - o". 3 &ß=- i".o Cot J = 9. 8 1 8o48n Cot Jo = 9.81 8o44„

The second set, from observations by Mr. Perrine on October 16th, and by Professor Hussey on October 31st and November 15th, is: -

T= 1897 Dec. 8.550029 G. M. T.

¿=69°-35'5i".5 ) Mean Equinox 4 12^32 2 56.6 Mean 4

0 = 65 48 38 .0 ) y/

q= 1. 357331 Representation of middle place -

AXcos/3 = + 11". 7 Aj8= + i9".6 CotJ = 9.238929n Cot J0 = 9.238926n

The value of log M used in determining the second set of elements was derived from the first set, as follows: -

log M = 0.064621 which agrees exactly with the value of

log M = 0.064621 resulting from the second set, so that the second set of elements must be considered as the best parabolic orbit which can be passed through the given observations.

University of California, Students' Observatory, December 13, 1897.

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