Academy op Sciences.] 

 No. 2.] 



(480) 



INDIVIDUAL DETERMINATIONS. 

 Lalande 15394, 7 h 49 m , +19° 31'. 



13 



+13.20 c- 7.81 m+ 0.22 *■=+ 0.0721mm. c= +0.0065 mm. 

 +107.35 + 1.95 =+ .1542 /»'=+ .00187. 



+10.48 =+ .0273 w=+ .00212. 



Probable error for unit weight, ± .0018 mm. = ±".026. 

 Annual proper motion in R. A., + ".100 ±".010. 

 Relative parallax, + ".031 ±".008. 



Other determinations of this parallax: At Mount Wilson (spectroscopic), +0".052; at 

 Dearborn Observatory, +0".069±0".010. Porter gives +0". 110 for the proper motion. 



(481) 



7 Sextantis, 9 h 47 m , + 2° 55'. 



+10.00 c+ 17.61 n-1.15 x=+ 0.0817 mm. c=+0.0138 mm. 

 +185.33 -0.89 =- .3422 M =- .00315. 



+6.63 =- .0115 *■=+ .00023. 



Probable error for unit weight, ± .0017 mm. = ±".024. 

 Annual proper motion in R. A., — ".168 ±".007. 

 Relative parallax, + ".003±".009. 



At the Yerkes Observatory this parallax was measured as +0". 057 + 0". 008. 

 -0".180 for the proper motion. 



Boss gives 



