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HD 323631


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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.

Erratum - Errors or Omissions in Star-Identifications in the General Catalogue of Trigonometric Stellar Parallaxes
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Observation and Astrometry data

Constellation:さそり座
Right ascension:17h31m35.47s
Declination:-40°36'13.1"
Apparent magnitude:10.157
Proper motion RA:137
Proper motion Dec:-91.4
B-T magnitude:11.373
V-T magnitude:10.258

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 323631
TYCHO-2 2000TYC 7888-1250-1
USNO-A2.0USNO-A2 0450-28370370
HIPHIP 85774
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