260 



Prsesepe Group; Measurement and Reduction 



Star 2-;A. 





Right Ascension : 



Declination : 



Plate. 



















At Epoch of 



p 



M. 



At Epoch 



At Epoch of 



P. M. 



At Epoch 





Plate. 







1875.0. 



Plate. 





1875.0. 



I 



i28°i5 / 57 // .So 





".32 



57".4S 



2O 26 / O3 // .IO 



±o // .09 



3", 19 



II 



• 74 



— 



•32 



.42 



2 .80 



+ -09 



2 .89 



III 



.70 



— 



•32 



•38 



3 -oo 



+ -09 



3 -09 



IV 



.96 



— 



•32 



.64 



2 .96 



+ .09 



3 -05 



V 



.42 



+ 



.16 



•53 



3 .10 



— -05 



3 -05 



VII 



.28 



+ 



.16 



•44 



3 -09 



— .05 



3 -04 



VIII 



.27 



+ 



.16 



•43 



3 -12 



— -05 



3 -°7 



IX 



.29 



+ 



.16 



•45 



3 - 12 



— -05 



3 -°7 



Mean, i 



28°i5'57". 4 8 



Mean, 2o°26 / o3 // .o6 



Probable Error, 



zh.024 



Probable Error, 



±.022 



Proper Motion, 



-0.069 ±0.007 



Proper Motion, +0.020 ±0.006 



Star 24. 



Plate. 



I 



II 



III 



IV 



V 



VII 



VIII 



IX 



Right Ascension : 



At Epoch of 

 Plate. 



I28°l6'58".57 



58 .24 



58 -57 



58 .67 



58 .19 



57 .89 



58 .32 

 58 .38 



P. 



M. 



— 



".21 



— 



.21 



— 



.21 



— 



.21 



4- 



.IO 



4- 



.IO 



4- 



.IO 



+ 



.IO 



At Epoch 



1875.0. 



53".36 



58 .03 



58 .36 



58 .46 



58 .29 



57 -99 



58 .42 



58 .48 



Mean, 

 Probable Error, 



Proper Motion, 



i28°i6 / 58^.30 



±.051 

 — 0.045 ±0.014 



Declination : 



At Epoch of 

 Plate. 



i9°58 / i9 // .27 

 .16 

 .22 

 .11 

 •29 

 .24 

 .27 

 .38 



P. 



M. 



4-0 



".07 



+ 



.07 



4- 



.07 



4- 



.07 



— 



•03 



— 



•03 



— 



•03 





.04 



At Epoch 



1875.0. 



i9"-34 

 •23 

 .29 

 .18 

 .26 

 .21 

 .24 

 •34 



Mean, ig°58'ig".26 



Probable Error, ±.016 



Proper Motion, +0.015 ±0.004 



