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HD 81921


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UVBY H-beta photometry of UV-bright stars
uvby H-beta photometry is presented for 90 stars taken from an earlyversion of the Carnochan and Wilson (1983) catalogue of stars that havevery negative UV colors. Two have definite UV excesses (HD 36629, and HD81307). Four early-B stars have UV colors too positive for their visibleclassification, and beta-indices that indicate higher luminosities thanappear possible on galactic distribution grounds. Six late-B starsappear to have discordant flux distributions for which there are noobvious explanations. It is suggested that the high population ofsubluminous stars derived by Carnochan and Wilson is the product of thestatistical treatment used and the extreme patchiness in theinterstellar absorption, which gives rise to large numbers oflittle-reddened stars.

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观测天体数据

星座:船帆座
右阿森松:09h26m58.92s
赤纬:-48°41'38.7"
视星:6.803
距离:534.759 天文距离
右阿森松适当运动:-21.9
赤纬适当运动:9.9
B-T magnitude:6.745
V-T magnitude:6.799

目录:
适当名称
HD 1989HD 81921
TYCHO-2 2000TYC 8171-1398-1
USNO-A2.0USNO-A2 0375-07912542
HIPHIP 46348

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