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HD 285305


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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.

Sur un changement de forme de la queue de la Comète Jarlof-Achmarof-Hassel 1939 III et sa liaison probable avec deux éruptions solaires
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Observation and Astrometry data

Constellation:Taurus
Right ascension:04h02m03.09s
Declination:+17°17'50.6"
Apparent magnitude:9.42
Proper motion RA:46.4
Proper motion Dec:-10.1
B-T magnitude:10.371
V-T magnitude:9.499

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 285305
TYCHO-2 2000TYC 1254-98-1
USNO-A2.0USNO-A2 1050-01114074
HIPHIP 18823
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