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HD 346637


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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.

Etoiles doubles nouvelles (3e serie) decouvertes a Nice avec la lunette de 50 centimetres.
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Observation and Astrometry data

Constellation:Fuchs
Right ascension:20h26m01.82s
Declination:+22°57'10.3"
Apparent magnitude:9.513
Proper motion RA:2.5
Proper motion Dec:-4.6
B-T magnitude:9.485
V-T magnitude:9.511

Catalogs and designations:
Proper Names
HD 1989HD 346637
TYCHO-2 2000TYC 2156-116-1
USNO-A2.0USNO-A2 1125-15966252
HIPHIP 100782
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