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HD 140557


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UBV photometry of stars whose positions are accurately known.
Photometric indices V, B-V, and U-B were measured for about 560 stars ofthe AGK3R and NPZT catalogs between BD declinations 11 deg and 23 deg,using the 40-cm Cassegrain telescope of the Kvistaberg Observatory fromApril 1986 to May 1987. The observation procedure and the reductiontechnique were the same as in the earlier papers of this series by Oja(1984, 1985, 1986, and 1987). The mean errors were calculated from theinternal consistency of the data. The accuracy was found to be the sameas for the earlier parts of the survey.

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观测天体数据

星座:巨蛇座
右阿森松:15h43m54.84s
赤纬:+12°49'06.2"
视星:8.132
距离:10000000 天文距离
右阿森松适当运动:-6.6
赤纬适当运动:9.7
B-T magnitude:10.16
V-T magnitude:8.3

目录:
适当名称
HD 1989HD 140557
TYCHO-2 2000TYC 938-963-1
USNO-A2.0USNO-A2 0975-07954910
HIPHIP 77041

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