17 





COSMOS. 



Table of the Variable Stars, by F. Argelandeb. 



No. 



Name of tLe Star. 



Length of 

 Period. 



Brightness in the 

 Maxirauin. 1 Minimum. 



Hame of Discorerer ar.d 

 Date of Discovery. 



1 oCeti 



2 3 Persei 



3.rCygni 



4,30 Hydra) Hev. . 

 5LeonisR.,420M. 



6I77 Aquilee 



7|/? Lyrae 



8 d Cephei 



9, a Herculis 



lO|Coron?e R. . .... 



ll|ScutiR. 



12jVirginis R 



13 Aquarii R 



14Serpentis R 



ISSerpentis S. 



IBiCancri R. 



ITia Cassiopeiae 



ISja Orionis 



19aHy(]ra3 



20 e Auriga) 



21 

 22 

 23 

 24 



C Geminorum 



/3 Pegasi 



Pegasi R. .. . 

 Caiicri S 



D. H. M. 



331 20 — 



2 20 49 



406 1 30 



495 



312 18 — 

 7 4 14 



12 2145 

 5 8 49 



66 8 — 

 323 



71 17 — 

 145 21 — 

 388 13 — 



359 



367 5 — 

 380 



79 3 — 

 196 



55 



7 



10 3 35 



40 23 — 



350 



1 



Magnit. 



4 to 2-1 



23 

 6-7 to 4 



5 to 4 



5 



34 



3-4 



43 



3 



6 



6 5 to 5-4 



7 to 6-7 

 9 to 6 7 



67 



8 to 7 8 



7 



2 



1 



2 



34 



43 



2 



8 



78 



Maguit. 







4 















54 



45 



5-4 



3-4 







9 to 



6 























32 



12 



23 



4-5 



54 



23 











Hohvarda, 1639. 



Montanari, 1669. 



Gottfr. Kirch, 1687. 



Maraldi, 1704. 



Koch, 1782. 



E. Pigott, 1*'84. 



Goodricke, 1784. 



Ditto, 1784. 

 Wm. Herschel 1795. 



E. Pigott, 1795. 



Ditto, 1795. 



Harding, . 1809. 



Ditto, 1810. 



Ditto, 1826. 



Ditto, 1828. 



Schwerd, 1829. 



Birt, 1831. 

 John Herschel, 1836. 



Ditto, 1837. 



Heis, 1846. 



Schmidt, 1847. 



Ditto, 1848. 



Hind, 1848. 



Ditto, 1848. 



EXPLANATORY REMARKS. 



The ill the cohimu of the minima indicates that the star is then 

 fainter than the tenth magnitude. For the purpose of clearly and con- 

 veniently designating the smaller variable stars, which for the most part 

 have neither names nor other designations, I have allowed myself to ap- 

 pend to them capitals, since the letters of the Greek and the smaller 

 Latin alphabet have, for the most part, been already employed by 

 Bayer. 



Besides the stars adduced in the preceding table, there are almost as 

 Tiiany more which are supposed to be variable, since their magnitudes 

 tire set down differently by different observers. But as these estimates 

 were merely occasional, and have not been conducted with much pre- 

 cision, and as different astronomers have different principles in estima- 

 ting magnitudes, it seems the safer course not to notice any such cases 

 nntil the same observer shall have found a decided variation in them at 

 different times. With all those adduced in the table, this is the case; 

 and the fact of their periodical change of light is quite established, even 

 whero the period itself has not been ascertained. The periods given in 

 the table are founded, for the most part, on my own examination of all 

 the earlier observations that have been published, and on my own ob- 

 servations within the last ten years, which have not as yet been pub 

 lished. Exceptions will bo mentioned in the following notices of the 

 several stars. 



In these notices the positions are those fir 1830, and are expressed io 



