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HD 339530


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The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars
The Henry Draper Extension Charts (HDEC), published in the form offinding charts, provide spectral classification for some 87000 starsmostly between 10th and 11th magnitude. This data, being highlyvaluable, as yet was practically unusable for modern computer-basedastronomy. An earlier pilot project (Roeser et al. 1991) demonstrated apossibility to convert this into a star catalogue, using measurements ofcartesian coordinates of stars on the charts and positions of theAstrographic Catalogue (AC) for subsequent identification. We presenthere a final HDEC catalogue comprising accurate positions, propermotions, magnitudes and spectral classes for 86933 stars of the HenryDraper Extension Charts.

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관측 및 측정 데이터

별자리:작은여우자리
적경:20h04m50.61s
적위:+24°33'14.5"
가시등급:9.674
적경상의 고유운동:-0.5
적위상의 고유운동:-8.2
B-T magnitude:9.793
V-T magnitude:9.684

천체목록:
일반명   (Edit)
HD 1989HD 339530
TYCHO-2 2000TYC 2145-1312-1
USNO-A2.0USNO-A2 1125-15038307
HIPHIP 98887

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