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HD 3815


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Positional reference stars in the Magellanic Clouds
The equatorial coordinates are determined of 926 stars (mainly ofgalactic origin) in the direction of the Magellanic Clouds at the meanepoch T = 1978.4 with an overall accuracy characterized by the meanvalues of the O-C coordinates, Sa = 0.35 arcsec and Sd = 0.38 arcsec,calculated from the coordinates of the Perth reference stars. Thesevalues are larger than the accuracy expected for primary standard stars.They allow the new positions to be considered as those of reliablesecondary standard stars. The published positions correspond to anunquestionable improvement of the quality of the coordinates provided inthe current catalogs. This study represents an 'astrometric step' in thestarting of a 'Durchmusterung' of the Magellanic Clouds organized by deBoer (1988, 1989).

Sir John Herschel's Observations of Stars in the Small Magellanic Cloud
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观测天体数据

星座:杜鵑座
右阿森松:00h39m41.14s
赤纬:-71°06'13.0"
视星:8.685
距离:200.803 天文距离
右阿森松适当运动:33.4
赤纬适当运动:-30.4
B-T magnitude:10.257
V-T magnitude:8.815

目录:
适当名称   (Edit)
HD 1989HD 3815
TYCHO-2 2000TYC 9138-290-1
USNO-A2.0USNO-A2 0150-00339303
HIPHIP 3120

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