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HD 99312


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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.

CCD measurements of visual binaries
CCD measurements of visual double stars were obtained with the ESO 1.5 mdanish reflector. All binaries observed are candidates for the HIPPARCOSInput Catalogue. More than 400 observations have been made in four clearnights. The accuracy obtained is comparable to the accuracy of thephotographic technique, but the observing and reduction times are oneorder of magnitude smaller.

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Observation and Astrometry data

Constellation:Zentaur
Right ascension:11h25m00.31s
Declination:-59°39'05.8"
Apparent magnitude:7.853
Distance:917.431 parsecs
Proper motion RA:-27.4
Proper motion Dec:14.1
B-T magnitude:9.581
V-T magnitude:7.996

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 99312
TYCHO-2 2000TYC 8629-449-1
USNO-A2.0USNO-A2 0300-12635850
HIPHIP 55719

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