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HD 65085


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A study of galactic structure in a region of Puppis
Galactic structure and rotation in the region of the Puppis OB 1 and OB2 associations are investigated on the basis of spectrophotometric andkinematic observations. Data was obtained from measurements of platestaken at the ESO objective prism astrograph at a spectral dispersion of110 A/mm. Spectral types, B magnitudes, distance moduli andgalactocentric distances are presented for 102 stars, including 74 oftypes O5 through B3 and the remainder of types B5 and B6, and radialvelocities determined by Fehrenbach's method as well as derived circularvelocities are presented for 63 OB stars. The results demonstrate thereality of the Pup OB 1 association, which is found at a distancemodulus of 12.20 with a mean radial velocity of 37 km/sec. The physicalreality of the Pup OB 2 association, however, appears doubtful, due tothe spread of the more distant group of OB stars (distance modulus13.45, mean radial velocity 57 km/sec) over a distance of more than 3kpc; this more distant group, as well as the H II region S 311, areassigned to an extension of the Perseus arm. The galactic rotation curvederived is found to exhibit a clear rise for galactocentric distancesgreater than 12.5 kpc.

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观测天体数据

星座:船尾座
右阿森松:07h56m05.40s
赤纬:-26°43'28.1"
视星:7.911
距离:769.231 天文距离
右阿森松适当运动:-2.9
赤纬适当运动:4.5
B-T magnitude:7.904
V-T magnitude:7.911

目录:
适当名称   (Edit)
HD 1989HD 65085
TYCHO-2 2000TYC 6561-2689-1
USNO-A2.0USNO-A2 0600-08262244
HIPHIP 38760

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