262 



Preesepe Group; Measurement and Reduction 



Star 27. 





Right Ascension : 



Declination : 



Plate. 

















At Epoch of 



P. M. 



At Epoch 



At Epoch of 



P. M. 



At Epoch 





Plate. 





1875.0. 



Plate. 





1875.0. 



n 1 



I28°I7 / 52 // .8o 



— o".i7 



52".6 3 



20°o6 / 36 // .49 



+o".i5 



36". 64 



•35 



— 



17 



.18 



•67 



+ .15 



.82 



III 



.56 



— 



16 



.40 



•50 



+ .15 



•65 



IV 



• 71 



— 



16 



•55 



•43 



+ .15 



.58 



V 



.42 



+ 



08 



•5o 



•70 



— .07 



•63 



VII 



•34 



+ 



08 



.42 



•73 



— -07 



.66 



VIII 



•30 



+ 



08 



.38 



• 71 



— .07 



.64 



IX 



•39 



+ .08 



•47 



.86 



— .08 



.78 



Mean, 128 17^52^.44 



Mean, 20°o6 / 36 // .68 



Probable Error, ±.037 



Probable Error, ±.022 



Proper Motion, — 0.035 ±0.010 



Proper Motion, +0.032 ±0.006 



Star 28. 





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°i8'o6".53 



— o // .i9 



6"-34 



20°i6 / 3i // .oi 



+o // .o7 



3 1 ".08 



II 



.26 



— .19 



.07 



30 .96 



+ .07 



31 -03 



III 



• 44 



— .19 



•25 



30 .78 



+ -07 



30 .85 



IV 



•58 



— -19 



•39 



30 .93 



+ .07 



31 .00 



V 



.21 



+ .09 



•30 



30 -98 



— -03 



30 -95 



VII 



•03 



+ .09 



.12 



30 -97 



— -03 



30 -94 



VIII 



.22 



+ .09 



•3i 



31 .08 



— -03 



31 -05 



IX 



.22 



+ .09 



•3i 



31 .06 



— .04 



31 .02 



Mean, i28°i8 



'06". 26 



Mean, 2o°i6 / 3o".g9 



Probable Error, 



±.030 



Probable Error, ±.020 



Proper Motion, — 0.041 



3 ±0.008 



Proper Motion, -4-0.015 ±0.006 



