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HD 121759


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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.

Population studies. IV - The Rose 'red horizontal branch' candidates as probes of the thick disk
DDO observations are reported for 10 of the Upgren (1962) red giantswhich Rose (1985) has identified as red horizontal branch (RHB) stars ofa globular cluster type population in the Gilmore-Reid thick disk. It isshown here that, while in the final analysis Rose's hypothesis may becorrect, it is not unique, and that his RHB candidates have all thecharacteristics of clump stars in the old, metal-deficient, open clusterNGC 2243. The only way to test Rose's hypothesis in an unambiguous wayis to analyze a complete sample of stars having colors in the range B-Vbetween 0.7 and 0.95, rather than one chosen by spectral-type criteria.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Erbogan
Sað Açýklýk:13h58m03.52s
Yükselim:-33°58'38.7"
Görünürdeki Parlaklýk:7.867
Uzaklýk:262.467 parsek
özdevim Sað Açýklýk:-66.7
özdevim Yükselim:0
B-T magnitude:9.072
V-T magnitude:7.967

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 121759
TYCHO-2 2000TYC 7288-1040-1
USNO-A2.0USNO-A2 0525-16814192
HIPHIP 68231

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