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HD 90949


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A catalog of selected compact radio sources for the construction of an extragalactic radio/optical reference frame
A catalog of 234 strong compact extragalactic radio sources that displayoptical counterparts is presented. This catalog identifies proposedsources for establishing an almost inertial reference frame againstwhich the motions of the earth, solar system, galactic objects, andspacecraft may be measured. This catalog also defines those sources forwhich precise optical positions should be determined in order to relatethis reference frame with the optical FK 5 fundamental system. Theaccuracy of the radio source positions of these sources is not greaterthan 0.1 arcsec with the majority not greater than 0.01 arcsec. Furtherrefinement to not greater than 0.005 arcsec by future observations isexpected soon.

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观测天体数据

星座:船底座
右阿森松:10h26m57.75s
赤纬:-73°15'41.5"
视星:9.077
右阿森松适当运动:-1.3
赤纬适当运动:-6.3
B-T magnitude:9.072
V-T magnitude:9.077

目录:
适当名称   (Edit)
HD 1989HD 90949
TYCHO-2 2000TYC 9223-151-1
USNO-A2.0USNO-A2 0150-07144288
HIPHIP 51154

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