of Double Stars in the Southern Hemisphere. 305 



R. Asc. 12^ le'" ; Decl. 62° T S. 



a Crucis. Triple ; 2d, 2.3cl, and 6th magnitudes. 



Observations on the 2d and 2.3d magnitudes. 



Both yellowish white ; smaller rather pale. 

 Angle of Position, 24° 24/ South Following. 

 Distance, 5",55. 

 N. B. Castor and a Crucis are double stars very similar to 

 one another in point of magnitude, colour, and distance. The 

 following comparison was made on the 26th March 1826, by 

 the double image micrometer. 



Distance Castor, 5",375. 

 Distance a Crucis, 5",292. 



R. Asc. 12*^ 16"^ ; Decl. 62° T S. 

 a Crucis. Double ; 2d and 6th magnitudes. 



Large white ; small reddish yellow. 

 Angle of Position, 70° 0' South Preceding. 

 Diff, of R. Ascension, 4", 45 ; 

 Diff. of Declination, 81'',473. 

 Mr Fallows mentions this star accompanying a Crucis as a 

 star of the small 4th magnitude. I have never observed it for 

 a star of more than the 6th, and frequently as a star of the 6.7th 

 magnitude. I have never suspected it as *a variable star. 



d Pictoris. R. Asc. 5^ 20"^ ; Decl. 58° 28' S. 

 5.6 and 6.7 m. L. yellow ; S. bluish white. 

 Angle of position, 14° 4/ North Preceding. 

 Diff. of R. Ascension, 4",19. 

 Diff. of Declination, 9'',055 ; 

 Distance, 38%516. 



7 Crucis. R. Asc. 12^^ 21"^ ; Decl. BG"" 7 S. 

 2 and 6.7 m. L. dusky red ; S. pale. 

 Angle of Position, 46° 42' North Following. 

 Diff. of R. Ascension, T',216; 

 Diff. of Declination, 70",854. 



Crucis. R. Asc. 12'^ 44'" ; Decl. 56"" 13' S. 

 5 and 6 m. Both white. 

 Angle of Position, 79° 48' North Following. 

 Diff of R. Ascension, 1^^,375 ; 



VOL. X. NO. II. APRIL 1829. U 



