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HD 173770


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The S201 far-ultraviolet imaging survey. III - A field in Sagittarius
Far-ultraviolet imagery of a 20 deg diameter field in Sagittarius,centered near (1950) R.A. 18 h 34 m, decl. -30 deg 25 arcmin, wasobtained by the S201 far-ultraviolet camera during the Apollo 16mission. In a 10-minute exposure covering the 1250-1600 A wavelengthrange, 1034 star images are detectable, with a limiting ultravioletmagnitude of about 10. Most of these objects are identified withearly-type stars listed in the Smithsonian Astrophysical ObservatoryStar Catalog, the Catalog of Stellar Identifications, or both, but 203objects remain unidentified or are identified with late-type stars. Thephotometric measurements appear to be in reasonable agreement with thoseof the International Ultraviolet Explorer for stars in common, and withexpectations for A0 stars. A detailed photometric study was made of theMessier 8 region, and it is concluded that dust-scattered starlightcontributes about half of the total radiation observed from the centralregion of M8.

UBV photometry for southern OB stars
New UBV photometry of 1227 OB stars in the southern Milky Way ispresented. For 1113 of these stars, MK spectral types have been reportedpreviously in a comprehensive survey to B = 10.0 mag.

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Сазвежђа:Стрелац
Ректацензија:18h48m22.54s
Deклинација:-31°51'53.9"
Apparent магнитуда:7.582
Даљина:414.938 parsecs
Proper motion RA:2
Proper motion Dec:-7.9
B-T magnitude:7.517
V-T magnitude:7.577

Каталог и designations:
Proper имена   (Edit)
HD 1989HD 173770
TYCHO-2 2000TYC 7408-79-1
USNO-A2.0USNO-A2 0525-38435562
HIPHIP 92280

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