146 



Parallax of 6 1 2 Cygni, deduced from 



Table XIX. — Parallax Equations in Distance. 

 Comparison Star, 61 1 Cygni. 



Plate. 

















v. 



I 



LOOP 





—1-690 



— 0.77IT 



— 



" . 140=0 



— 



".248 



2 



I.OO 





—1.68 



—0.74 



+ 



.136=0 



+ 



.032 



3 



I.OO 





—1.68 



—0.74 



+ 



.200= 



+ 



.096 



4 



I.OO 





-0.63 



—o.57 



+ 



.076= 



+ 



.022 



5 



I.OO 





—o.59 



-0-37 



— 



.058= 



— 



.085 



6 



I.OO 





^>-59 



—0.37 



+ 



.085= 



+ 



.058 



7 



I.OO 





-0.58 



—o.34 



+ 



.078= 



+ 



•055 



8 



I.OO 





+0.33 



—0.71 



+ 



.001=0 



— 



•045 



9 



I.OO 





+°-33 



— 0.71 



— 



.147=0 



— 



•193 



IO 



I.OO 





+0.34 



— 0.67 



+ 



.030= 



— 



.010 



ii 



I.OO 





+o.35 



-0.65 



+ 



.243=0 



+ 



.205 



12 



I.OO 





+o.35 



—0.65 



+ 



.061= 



+ 



.023 



13 



I.OO 





+0.35 



—0.65 



+ 



.128=0 



+ 



.090 



15 



I.OO 





+0.87 



+o.55 



+ 



.038= 



+ 



.168 



16 



I.OO 





+0.90 



+0.42 



— 



.039= 



+ 



•075 



17 



I.OO 





+0.90 



+0.42 



— 



.022= 



+ 



.092 



iS 



I.OO 





+0.91 



+0.40 



— 



.246=0 



— 



•134 



19 



I.OO 





+0.91 



+0.40 



— 



.280=0 



— 



.168 



20 



I.OO 





+0.91 



+0.40 



— 



.146=0 



— 



, -°33 









Normal Equations. 











+19.000 OOOZ + O.OIOi 



300# —5.350 



000IT - 



-0 // .002 OOO = 



= 











+15.492500 +5-728 



200 — .957 070 : 



= 













+6.262 



300 - 



-O .691430 = 



= 













Solution. 





Weights. 











x = 



= +o // .0362 



±o // .0249 





12.08 











y= 



= +0 .0272 



±0 .0295 





8-59 











n = 



= +0 .1282 ±0 .0533 





2.64 









Probable 



error of one equation = ±o // .o865. 



[»»] =0 



.2634 





