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HD 64301


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Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.

UVBY H-beta photometry of UV-bright stars
uvby H-beta photometry is presented for 90 stars taken from an earlyversion of the Carnochan and Wilson (1983) catalogue of stars that havevery negative UV colors. Two have definite UV excesses (HD 36629, and HD81307). Four early-B stars have UV colors too positive for their visibleclassification, and beta-indices that indicate higher luminosities thanappear possible on galactic distribution grounds. Six late-B starsappear to have discordant flux distributions for which there are noobvious explanations. It is suggested that the high population ofsubluminous stars derived by Carnochan and Wilson is the product of thestatistical treatment used and the extreme patchiness in theinterstellar absorption, which gives rise to large numbers oflittle-reddened stars.

Photometric standard sequences in Puppis iII = 235° - 255°
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Observation and Astrometry data

Constellation:Πρύμνη
Right ascension:07h51m57.27s
Declination:-31°38'11.2"
Apparent magnitude:8.113
Distance:609.756 parsecs
Proper motion RA:-5
Proper motion Dec:7.4
B-T magnitude:8.031
V-T magnitude:8.107

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 64301
TYCHO-2 2000TYC 7119-806-1
USNO-A2.0USNO-A2 0525-06532516
HIPHIP 38395

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