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TYC 3463-673-1


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Toward the HIPPARCOS link: astrometry of stars and extragalactic sources in the field of the spiral galaxy M51.
We present absolute proper motions of 14 Hipparcos stars from groundbased photographic astrometry in a 2x2deg field around the spiral galaxyMessier 51. These are part of a catalogue of 340 stars with B<=16,for which positions, proper motions, and B magnitudes have been derivedfrom a series of 16 photographic plates. Due to large epoch differencesof up to 88 years between the observations, the proper motion accuracyis typically <=1mas/a. An extragalactic calibration of the propermotion zero-point is achieved by measuring the fictitious proper motionsof bright extragalactic objects in the field. For this purpose, across-correlation technique was developed. The resulting precision ofthe proper motion link to an extragalactic frame is estimated as1.0mas/a. Measurements of double stars and high proper motion stars arealso discussed.

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观测天体数据

星座:獵犬座
右阿森松:13h34m24.88s
赤纬:+46°24'27.8"
视星:8.48
距离:292.398 天文距离
右阿森松适当运动:-0.9
赤纬适当运动:3
B-T magnitude:9.961
V-T magnitude:8.603

目录:
适当名称   (Edit)
TYCHO-2 2000TYC 3463-673-1
USNO-A2.0USNO-A2 1350-08298076
HIPHIP 66228

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