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HD 157372


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The dwarf spheroidal galaxy in Draco. I - New BV photometry.
BV photoelectric photometry for 39 stars and BV photographic photometryfor 514 stars in the field of the Draco dwarf spheroidal galaxy arepresented. The color-magnitude diagram for 512 of these field stars isfound to display a well-defined red horizontal branch as well as a redgiant branch whose observed width is comparable to the accidentalphotometric error. The results also indicate that a more diffusesequence of stars lies about 0.1 mag to the blue of the giant branch andthat an upper horizontal branch of more massive core helium-burningstars may also be present. The foreground reddening toward Draco is thendetermined by narrow-band uvby-beta photometry of galactic B-A-F stars.

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观测天体数据

星座:天龍座
右阿森松:17h20m09.51s
赤纬:+51°40'32.0"
视星:8.125
距离:813.008 天文距离
右阿森松适当运动:-4.5
赤纬适当运动:-5.4
B-T magnitude:9.513
V-T magnitude:8.24

目录:
适当名称
HD 1989HD 157372
TYCHO-2 2000TYC 3520-1530-1
USNO-A2.0USNO-A2 1350-09160218
HIPHIP 84820

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