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HD 218934


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New Photoelectric Light Curves of AB Andromedae
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Photoelectric observations of W UMa stars - U Pegasi and AB Andromedae
The quadratic ephemerides of the W UMa systems U Pegasi and ABAndromedae are computed from photoelectric and photometric data toanalyze the objects' periodicities. The minima obtained for the presentwork are incorporated into the minima obtained by Lafta and Grainger(1986) for the quadratic ephemerides calculation. U Pegasi is found tohave a decreasing period with a rate of change of -0.91 s/century, whileAB Andromedae increases steadily at 0.83 s/century, and the existence ofa third unseen object is postulated.

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观测天体数据

星座:仙女座
右阿森松:23h11m39.59s
赤纬:+36°47'40.7"
视星:8.327
距离:6666.667 天文距离
右阿森松适当运动:0
赤纬适当运动:-26.1
B-T magnitude:9.585
V-T magnitude:8.431

目录:
适当名称
HD 1989HD 218934
TYCHO-2 2000TYC 2763-313-1
USNO-A2.0USNO-A2 1200-19748469
HIPHIP 114514

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