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HD 103306


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UBV polarimetry of 361 A- and F-type stars in selected areas
We present simultaneous UBV linear polarization measurements for 361 A-and F-type stars with accurate colour excess and distance determination.These stars are distributed in 35 Kapteyn's Selected Areas, covering thethird and fourth quadrants of the galactic plane (|b| <= 30degr ).The obtained polarization and the known colour excess are compared. Ananalysis of the polarization distribution as a function of the stellardistance is also performed. Based on observations collected at theEuropean Southern Observatory (ESO), La Silla, Chile.

Four-colour UVBY and H-beta photometry of all stars earlier than G0 and brighter than MPG of about 10.7 M in Selected Area 203 towards the Chamaeleon-Musca dark clouds
Results are presented of Stromgren uvby(beta) photometry for 213 starsearlier than G0 and brigher than mpg of about 10.7 m inSelected Area 203. The observed area lies close to the geometric centerof the Chamaeleon-Musca dark clouds complex. The results yield V, (b-y),m1, c1, and beta on the standard systems, withoverall rms errors for one observation of one star of 0.010, 0.004,0.007, 0.009, and 0.011, respectively.

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Observation and Astrometry data

Constellation:Musca
Right ascension:11h53m21.86s
Declination:-74°32'22.7"
Apparent magnitude:8.939
Distance:153.139 parsecs
Proper motion RA:-69.2
Proper motion Dec:-31.3
B-T magnitude:9.449
V-T magnitude:8.982

Catalogs and designations:
Proper Names
HD 1989HD 103306
TYCHO-2 2000TYC 9238-1535-1
USNO-A2.0USNO-A2 0150-09180611
HIPHIP 57965

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