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HD 155910


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Empirical temperature calibrations for early-type stars
Three temperature calibrations of suitable photometric quantities havebeen derived for O and B stars. A sample of 120 stars with reliableT(eff.) determinations has been used for establishing each calibration.The different calibrations have been critically discussed and compared.Temperature determinations for 1009 program stars have been obtainedwith an accuracy of the order of 10 percent.

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).

Investigations of a Milky Way field in Scorpius. VI. Radial velocities of bright O and B stars
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Observation and Astrometry data

Constellation:Scorpius
Right ascension:17h15m46.09s
Declination:-32°02'39.9"
Apparent magnitude:8.276
Distance:769.231 parsecs
Proper motion RA:-0.1
Proper motion Dec:-5.8
B-T magnitude:8.416
V-T magnitude:8.288

Catalogs and designations:
Proper Names
HD 1989HD 155910
TYCHO-2 2000TYC 7366-362-1
USNO-A2.0USNO-A2 0525-27659233
HIPHIP 84437

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