140 



MILLER— PARALLAXES OF FIFTY STARS. 



No. 43. B.D. -f3°.4473. 2 2737 = 6 Equulei. (20*^ 54".i; 

 + 3° 55'-) Mag. 5.29. /A = — 0^0084; — o". 1 44. 



Spectrum F^. 



This is a triple system. The three components, called by Burn- 

 ham, A (mag. 5.1), B (mag, 6.2), and C (mag. 7.1), have a com- 

 mon proper motion. A and B, separated by o".62, form a binary of 

 uncertain period. The measures were made by bisecting the com- 

 bined image of these two components, which is sensibly round. The 

 measures are in longitude. Other published parallaxes are : 

 Russell, (Hypothetical), + o".022. 

 Mitchell, (Photographic), + o".043 it o".oio. 

 Adams, (Spectroscopic), + o".038. 

 Mitchell found for C a parallax of o".oo2 ±: o".oi2. We did not 

 measure C because its images on our plates were very faint. 



Solution: c = 4" o".096. 



fi = — o".038 ± o".oo3. 



7r= -|- 0".0l8 ± o".OI2. 



p. e. unit weight, ± o".024. 



