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HD 21807


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관련 글

Measurements of 258 radial velocities in two fields near Alpha Per
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1987A&AS...68..515F&db_key=AST

Identification of the optical counterpart of the X-ray source V0332 + 53
The optical counterpart of the X-ray transient V0332 + 53 is a star ofmagnitudes V = 15.13 and B - V = 2.31. The line H-alpha has a P-Cygniprofile with the absorption component at -1400 km/s. The possibility ofa 2.198 s optical periodicity, at 3.4 sigma level, is investigated.

A spectrophotometric survey of stars along the Milky Way. IV
In the present paper a catalogue of spectrophotometric quantities,spectral types, monochromatic magnitudes and colour equivalents is givenfor all stars brighter than the magnitude m4400 = 10.5 in aregion of the Milky Way in Perseus. No absorption is found for starscloser than about r = 100 pc. The absorbing clouds are situated atdistances closer than 1 kpc and at about 2.5 kpc in the local arm andthe Perseus arm, respectively. The space between the two arms is freefrom absorption. It is also concluded that the Perseus arm continuesbeyond l = 140 deg, containing not only hydrogen gas but also dust to atleast l = 150 deg), while the content of OB stars decreases abruptly atl = 140 deg.

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관측 및 측정 데이터

별자리:기린자리
적경:03h33m22.69s
적위:+52°57'09.4"
가시등급:8.936
거리:211.416 파섹
적경상의 고유운동:-5.9
적위상의 고유운동:-11.3
B-T magnitude:9.275
V-T magnitude:8.964

천체목록:
일반명   (Edit)
HD 1989HD 21807
TYCHO-2 2000TYC 3716-319-1
USNO-A2.0USNO-A2 1425-04389260
HIPHIP 16575

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