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TYC 4383-1917-1


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Absolute stellar proper motions with reference to galaxies of the M81 group
We report on the measurement of absolute proper motions of stars ofmagnitude 7 to 14.5 in a 2 deg X 2 deg field in the region of the M81group of galaxies. This work is part of the Bonn program for theextragalactic link of Hipparcos. The proper motions were determined froma collection of photographic plates covering the time interval from 1894to 1994. The absolute reference system for the proper motions isrepresented by the galaxies M81, M81, and NGC3077, for which accurateoptical reference positions were obtained by means of an imagecross-correlation technique. For the majority of stars, the internalproper motion accuracy is better than 1 mas/a. The precision of therealization of the absolute system is found to be around 1 mas/a. Intotal, our measurements yield absolute proper motions for 24 Hipparcosstars and positions, proper motions and photometry for 330 additionalstars including a number of visual binaries and high proper motionstars. Among the latter one G-type sub-dwarf is identified. The resultsare relevant as a contribution to the Hipparcos link, but also as adatabase for kinematic investigations.

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观测天体数据

星座:大熊座
右阿森松:09h57m13.67s
赤纬:+67°45'47.3"
视星:9.038
右阿森松适当运动:-9.2
赤纬适当运动:3.2
B-T magnitude:10.88
V-T magnitude:9.191

目录:
适当名称   (Edit)
TYCHO-2 2000TYC 4383-1917-1
USNO-A2.0USNO-A2 1575-03029035
HIPHIP 48803

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