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HD 302564


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VRI photometry of wide double stars with A- type primaries.
We are presenting VRI photometry of 93 wide visual double stars havinglate B- or A- type primaries, taken from the Annex of Double andMultiple Stars of the HIPPARCOS Input Catalogue. Spectral types havebeen estimated for most of the primaries and for the majority of thesecondaries. 40% of them probably have common origin components, forwhich we calculated photometric parallaxes and some orbital valuesestimates.

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.

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Observation and Astrometry data

Constellation:Carène
Right ascension:10h07m31.99s
Declination:-59°03'40.3"
Apparent magnitude:9.15
Proper motion RA:-15
Proper motion Dec:4.1
B-T magnitude:9.115
V-T magnitude:9.148

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 302564
TYCHO-2 2000TYC 8611-1134-1
USNO-A2.0USNO-A2 0300-08802453
HIPHIP 49609

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