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HD 276552


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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.

Objective-prism discoveries in the northern sky. I
Attention is given to 175 northern hemisphere stars whose newlyrecognized peculiar, or otherwise prepossessing characteristics havebeen noted in a preliminary inspection of moderate dispersion objectiveprism plates. The plates were obtained with a 10-deg prism. The starlist gives HD or BD, alpha and delta values, magnitude, and type.

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Datos observacionales y astrométricos

Constelación:Perseo
Ascensión Recta:04h33m17.18s
Declinación:+40°30'42.4"
Magnitud Aparente:8.828
Distancia:10000000 parsecs
Movimiento Propio en Ascensión Recta:2.5
Movimiento Propio en Declinación:-4.2
B-T magnitude:10.527
V-T magnitude:8.969

Catálogos y designaciones:
Nombres Propios   (Edit)
HD 1989HD 276552
TYCHO-2 2000TYC 2884-1610-1
USNO-A2.0USNO-A2 1275-03420112
HIPHIP 21234

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