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Optical observations of ultraviolet objects. II - Classification and photometry /l = 0 to 145 deg/ UBV photometry and MK spectral classification are presented for a sampleof stars originally selected as UV objects from satellite photometrywith the S2/68 experiment. Although most stars of the sample arespectroscopically normal, a number of hot, subluminous stars were alsofound. Radial velocities are given for some of the stars observed. It isproposed that the majority of the apparently normal early B stars athigh galactic latitudes which are not runaway stars are subluminousdisc-population analogues of horizontal branch B stars of Population II.
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Gözlemler ve gökölçümü verileri
Takýmyýldýz: | Kartal |
Sað Açýklýk: | 19h55m11.44s |
Yükselim: | +11°57'34.0" |
Görünürdeki Parlaklýk: | 7.756 |
Uzaklýk: | 568.182 parsek |
özdevim Sað Açýklýk: | 0.3 |
özdevim Yükselim: | -1.7 |
B-T magnitude: | 7.589 |
V-T magnitude: | 7.743 |
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