Parallaxes of Fifty Two Stars

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Parallaxes of Fifty Two Stars
George Van Biesbroeck
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640 +7. 405 =-2. 496 9. 780 =-0. 598 from which c=-0. 181 M=-0. 0533=-OT142 /n. = - ir= +0. 356 =+OT095OT10 Probable error corresponding to unit weight, OT029 The other determinations are: Parallax Observer Method +0 172 o ii tn Smith Hrliomi'trr +0 101 *0 024 Russell Photography +0 146 *0 029 Flint Meridian Circle +O 086 '0 004 Miller Photography +0 066 Adams Spectrum 41 Herculis (16 h 39>, +617') This seventh-magnitude star, /3 G. C. 7740, has a tenth magnitude companion at a distance of 163"..., with the same proper motion. Separate determina- tions were made for both 41 Herculis and the com- panion. In Boss's Preliminary General Catalogue the following proper motion is given for the bright star: -0!0146, -0^277 . The tliirt ecu plates were measured by Miss Steele.
TABU: i PLATES or 41 HEECDLIS No.
Date Hour Angle Observers Quality of Images 2163 1015 July 22 -O h l H 1, 0. X!
pi i I'. Ilii Mar Hi 3 K;iir 2. MO Apr i n i, Su. 1, 1 ilMHl 2521 \|ir LM ii 1 Su. 1.
Oood L'. '. -'s \iir 27 Su.


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