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HD 298657


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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.

Walraven photometry of nearby southern OB associations
Homogeneous Walraven (VBLUW) photometry is presented for 5260 stars inthe regions of five nearby southern OB associations: Scorpio Centaurus(Sco OB2), Orion OB1, Canis Major OB1, Monoceros OB1, and Scutum OB2.Derived V and (B - V) in the Johnson system are included.

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Osservazione e dati astrometrici

Costellazione:Vele
Ascensione retta:09h47m59.05s
Declinazione:-51°50'43.2"
Magnitudine apparente:10.627
Moto proprio RA:-6.8
Moto proprio Dec:3.7
B-T magnitude:10.935
V-T magnitude:10.653

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 298657
TYCHO-2 2000TYC 8193-984-1
USNO-A2.0USNO-A2 0375-09016920
HIPHIP 48071

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