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HD 156117


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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.

A photometric catalogue of stars in the direction of the bright cloud B in Sagittarius
The present catalog includes photometric data on stars in a 5.5 deg x5.5 deg area in the direction of the bright cloud B in Sagittarius,centered at l equals 357.7 deg, b equals plus 5.6 deg. V magnitudes andB-V and U-B colors are reported for nearly all HD and HDE stars in thefield and also for a number of interesting stars (402 stars), 21 propermotion stars, and 45 stars in a 15 arcmin radius circular regioncentered on the galactic cluster Trumpler 26 (Tr 26). Furthermore,photographic B, V, R, and IR magnitudes are listed for 274 stars in thefield of Tr 26. These data will be used for further studies ofinterstellar absorption in the Galaxy's central direction in relation tospecific objects (red variable stars, star clusters, diffuse objects).

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Observation and Astrometry data

Constellation:Scorpion
Right ascension:17h16m59.87s
Declination:-30°20'24.1"
Apparent magnitude:8.906
Proper motion RA:-1.2
Proper motion Dec:-12
B-T magnitude:9.483
V-T magnitude:8.954

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 156117
TYCHO-2 2000TYC 7362-518-1
USNO-A2.0USNO-A2 0525-27763740
HIPHIP 84542

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