142 ASTRONOMY FOR 1889, 1890. 



escaped being converted into a fifth satellite of Jupiter. Mr. Barnard 

 succeeded in finding and observing the comet again, on the night of 

 November 21, 1890, with the 36 inch Lick telescope, eight months after 

 it had been given up as beyond reach ; and when its distance from the 

 earth was 3.09, and from the sun 3.55. 



Comet 1889 VI : Swift, at Rochester, discovered a new comet on 



=rConiet/i889. November 16, while searching for new nebula?,; it 

 was a faint round nebulous mass, without tail, and it remained ex- 

 ceedingly faint during its entire period of visibility ; being seen in 

 only the most powerful telescopes about the middle of January. The 

 orbit proved to be elliptical, and with -the remarkably short period of 

 8,8 years, according to Searle's computation. 



Comet 1890 I : A faint comet was discovered by Borelly at the 



=Coinet <j 1H89. Marseilles Observatory on December 12, 1889, this 

 being the first comet, after an interval of three years, discovered in 

 Europe. On January 8, 1890, it appeared in the finder of the Munich 

 refractor like a faint star of the seventh or eighth magnitude. 

 Comet 1890 II : | Discovered l)y W. 11. Brooks at the Smith Ob- 



=• Comet a 1890. | servatory, Geneva, New York, March 19, 1890. A 

 small comet with stellar nucleus and short tail. It was still observable 

 about the middle of October. 

 Comet 1890 III : Discovered by Coggia at the Marseilles Observa- 



= Comet 6 1890, tory, July 18, 1890. It was quite bright, round, 

 with central condensation comparable with a star of about tenth or 

 eleventh magnitude. Its light rapidly diminished and it soon disap- 

 peared below the northwest horizon. Parabolic elements represent the 

 observations quite accurately, though they show some resemblance to 

 those of the comet ot 1580. 



This comet was discovered three months and a 

 half after perihelion passage b.y Zona at Palermo, 

 November 15, 1890. It was at first quite bright, but grew fainter 

 rapidly, though it was still observed after the close of the year. 

 Comet 1890 V : An ephemeris for d'Arrest's periodic comet 



= Comet d 1890. had been prepared by Leveau, and the comet 



= d'Arrest's comet. | ^j^g looked for without success for sometime, 

 and it^as feared that it had gone by undetected, when it was picked 

 up by Barnard at the Li(;k Observatory on October (>, as an entirely 

 unexpected object. On the first few nights the comet was extremely 

 faint and difiused, but it was seen later with a 34incli tinder. 



Comet 1890 IV : 



= Comet e 1890. 



Comet 1890 VI : Discovered by W. F. Denning at Bristol, Eng- 



= Comet c 1890. land, July 23, with a luinch reflector, a faint, 

 rounTTnebulosity, about V diameter with faint central condensation, 

 and quite near »? and C Ursie Minoris. It moved directly towards the 

 equator, and was visible till November, having a small stellar nucleus 

 of the thirteenth magnitude, and a faint diSused tail. 



