268 



Preesepe Group ; Measurement and Reduction 



Star 40. 





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 



l28°32 / i9 // .74 





".42 



19^.32 



i9°42 / i3 // .48 



+o".o5 



i3"-53 



II 



.92 



— 



.42, 



•50 



.60 



+ -05 



•65 



III 



.78 



— 



.42 



.36 



•65 



+ -05 



.70 



IV 



.92 



— 



.42 



•50 



•54 



4- .05 



•59 



V 



.14 



+ 



.21 



•35 



.67 



— .02 



• 65 



VII 



.22 



+ 



.21 



•43 



•65 



— .02 



•63 



VIII 



.29 



+ 



.21 



•50 



.61 



— .02 



•59 



IX 



.20 



+ 



.21 



.41 



.61 



— .02 



•59 



Mean, 1 



28°32 / ig // .42 



Mean, iq°42 / I3 // .62 



Probable Error, 



±.020 



Probable Error, ±.014 



Proper Motion, - 



-O.090 ±O.Oo6 



Proper Motion, +0.010 ±0.004 



Star 41. 



Plate. 



Right Ascension : 



Declination : 



At Epoch of 

 Plate. 



P. M. 



At Epoch 

 1S75 0. 



At Epoch of 

 Plate. 



P.M. 



At Epoch 



1875.0. 



VII 

 VIII 



I2S°o6 / o8 // .44 

 •30 



+o".io 

 + .10 



8".54 



.40 



2o°o6 / 2l".68 



.78 



— o // .o3 

 — -03 



2i".65 



•75 



Mean, i28°o6'o8".47 



Mean, 2o°o6 / 2i // .7o 



Star 42. 



Plate. 



Right Ascension : 



Declination : 



At Epoch of 

 Plate. 



P. M. 



At Epoch 

 1875.0. 



At Epoch of 

 Plate. 



P.M. 



At Epoch 

 1875.0. 



VII 

 VIII 



i28°38'oo".i6 

 59 -83 



+o".i 5 

 + .15 



00". 3 1 



59 -98 



20°o6 / i6 // .46 

 .29 



— o".o8 



— .08 



16^.38 

 .21 



Mean, i28°38'oo".i4 



Mean, 2o°o6'i6 // .30 



