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HD 254903


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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.

Stellar Spectra in Milky way Regions. VIII. a Region in Orion.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1959ApJS....4...23M&db_key=AST

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观测天体数据

星座:獵戶座
右阿森松:06h18m35.18s
赤纬:+12°07'25.5"
视星:9.496
右阿森松适当运动:-0.3
赤纬适当运动:0.5
B-T magnitude:9.47
V-T magnitude:9.494

目录:
适当名称   (Edit)
HD 1989HD 254903
TYCHO-2 2000TYC 739-1991-1
USNO-A2.0USNO-A2 0975-02929271

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