172 



COSMOS. 



Table of the Variable Stars, by F. Argelander. 



Name of the Star. 



Length of 



Brightnes 



Maximum. 



MiTiimun 



Name of Discoverer and 

 Date nf Discovery. 



Ceti 



Persei 



*Cygni 



30 Hydra Hev. . 

 LeonisR.,420M 



n Aquilae 



/? Lyra 



6 Cephei .. 



a Herculis 



Goronae R 



Scuti R 



Virginis R 



Aquarii R 



Serpentis R 



Serpentis S 



Ciincri R. 



a Cassiopeiae ... 



a Orionis 



a Hyd ra 



e Auriga? 



CGeminorum ... 



22| Pegasi . 

 Pegasi R. 

 CancriS.. 



331 20 



2 20 49 



406 1 30 



495 



312 18 

 7 4 14 



12 21 45 

 5 8 49 



66 8 

 323 



71 17 

 145 21 

 388 13 



359 



367 5 

 380 



79 3 

 196 



55 



1 



10 3 35 



40 23 



350 



1 



Magnit. 



4 to 21 



23 

 6 7 to 4 



5 to 4 



5 



3-4 



3-4 



4-3 



3 



6 



6 5 to 5-4 



7 to 6-7 

 9 to 6 7 



67 



8 to 7 8 



7 



2 



1 



2 



3-4 



4-3 



2 



8 



78 



Magnit. 







4 















54 



45 



5-4 



3-4 







9 to 6 























3-2 



1-2 



23 



45 



54 



23 











Holwarda, 



Montanari, 



Gottfr. Kirch, 



Maraldi, 



Koch, 



E. Pigott, 



Goodricke, 



Ditto, 



Wm. Herschel 



E. Pigott, 



Ditto, 



Harding, 



Ditto, 



Ditto, 



Ditto, 



Schwerd, 



Birt, 



John Herschel, 



Ditto, 



Heis, 



Schmidt, 



Ditto, 



Hind, 



Ditto, 



1639. 

 1669. 

 1687. 

 1704. 

 1782 

 1784. 

 1784 

 1784. 

 1795. 

 1795. 

 1795. 

 1809. 

 1810. 

 1826. 

 1828. 

 1829. 

 1831 

 1836. 

 1837 

 1846. 

 1847. 

 1848. 

 1848. 

 1848. 



EXPLANATORY REMARKS. 



The in the column 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 

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

 are 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 

 until 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 

 where 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 be mentioned in the following notices of the 

 several stars. 



In these notices the positions are those for 1850, and are expressed in 



