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HD 173505


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Walraven photometry of nearby southern OB associations
Homogeneous Walraven (VBLUW) photometry is presented for 5260 stars inthe regions of five nearby southern OB associations: Scorpio Centaurus(Sco OB2), Orion OB1, Canis Major OB1, Monoceros OB1, and Scutum OB2.Derived V and (B - V) in the Johnson system are included.

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.

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Datos observacionales y astrométricos

Constelación:Corona Austral
Ascensión Recta:18h47m19.04s
Declinación:-37°32'55.2"
Magnitud Aparente:7.069
Distancia:127.065 parsecs
Movimiento Propio en Ascensión Recta:2.7
Movimiento Propio en Declinación:-28.2
B-T magnitude:7.023
V-T magnitude:7.066

Catálogos y designaciones:
Nombres Propios   (Edit)
HD 1989HD 173505
TYCHO-2 2000TYC 7915-252-1
USNO-A2.0USNO-A2 0450-35717096
HIPHIP 92188

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