Nov 1882
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1882natur..27....5s&link_type=abstract
Nature, Volume 27, Issue 679, pp. 5 (1882).
Computer Science
Scientific paper
ON Wednesday, the 25th instant, at 6.10 am., Mr. Hodges and I again obtained two mesures of position of the nucleus with the equatorial, after correcting for instrumental errors and refraction, the mean of the readings comes out R.A. 10h. 6m. 48s., Dec. 17° 2' 55''. But owing to flexure of the instrument and to the fact that the circles read only to 20'' and 2s. respectively, these figures are open to correction. Daylight, with a little haze, had so far advanced when the measures were completed, that only the nucleus was distinguishable in the telescope; but with the filar micrometer I measured its length; the mean of two readings came out to 41''.5, but owing to the gradual shading off of the nucleus, one's readings might vary 5'' according to its assumed limits, The width I made about 10''. I was rather surprised at these results, as I had estimated its length two days before at about 10'' only; but I had then used an eye-piece to which I am not accustomed, and my estimate was probatly an error. The position angle of the major axis of the nucleus was 108° 7'.
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