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HD 247828


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Observations of Double Stars. XVIII.
Micrometer observations of 1350 pairs in 1995-1997 are listed.

Observations of double stars and new pairs. XV
The study reports visual and photographic measures listed for 1150 pairsobtained in the time frame 1989.91-1992.15, including 221 new doublestars. Magnitudes were estimated for a part of the objects, especiallythe fainter ones. Plate orientations were calculated from field stars ofknown positions and were precessed to the epoch; numbers of nights andof measured exposures are given. Reobservation of faint, neglected pairsreveal many corrections to the data from the old discovery lists.

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观测天体数据

星座:獵戶座
右阿森松:05h48m08.82s
赤纬:+09°31'17.2"
视星:10.548
右阿森松适当运动:3.3
赤纬适当运动:-4.6
B-T magnitude:10.875
V-T magnitude:10.575

目录:
适当名称
HD 1989HD 247828
TYCHO-2 2000TYC 719-735-1
USNO-A2.0USNO-A2 0975-02033610

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