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HD 258101


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Uvby-beta observations of 528 type B stars with V between the 8th and 9th magnitude
The paper presents uvby-beta measurements of 528 type B stars selectedfrom the SAO Catalog on the basis of two criteria: the spectral types inthe range B3-B5 and mV between the 8th and the 9th magnitude. Reddeningindependent (c1) values are estimated from the spectral classificationand compared to the observed values. No systematic trend with observed(b-y), H-beta, or spectral type appears to be present, but the range of(c1) residuals is surprisingly large. A rather large part of the starshas small beta values, smaller than for the BIa supergiants. Only twoare classified as O stars and most of them have the suffix e, ne, ornne. Most beta values for the O type stars are slightly above the upperlimit of 2.585 m.

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Observation and Astrometry data

Constellation:Gémeaux
Right ascension:06h29m15.30s
Declination:+13°17'23.5"
Apparent magnitude:9.285
Proper motion RA:-1.8
Proper motion Dec:0.5
B-T magnitude:9.621
V-T magnitude:9.313

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 258101
TYCHO-2 2000TYC 744-1648-1
USNO-A2.0USNO-A2 0975-03308441

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