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HD 14900


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관련 글

2000 A UV imaging of a 6 deg diameter field around the H and Chi Persei double cluster
A stellar field centered close to the h and Chi per double cluster hasbeen observed at 2000 A by the stratospheric balloon-born telescope ofthe SCAP-2000 program. It is shown that the prevailing extinction lawproduces greater extinction at 1965 A than is predicted by the meanextinction law. The results suggest the presence of an H2 cloud in frontof h and Chi Per in the second absorbing layer and in the local arm. Agroup of hot stars centered at the same distance as the molecular cloudmay form an association of OB stars in the local arm.

Evidence of helium abundance differences between young groups of stars
Seven groups of B-type stars - Sco-Cen, NGC 6231, LacOBI,OriOBIb, h + chi Per, CepOBIII, and field stars - wereinvestigated photoelectrically to determine whether helium abundance isuniform in the solar neighborhood and in a region of the spiral arm ofthe Galaxy. Observations were performed using an echelle spectrometer inthe narrow band index of the I (4026) of the He I-4026 line. Amodel-atmosphere analysis of I (4026) and the beta index of the H betaline shows that in the spectral range B O-B 2, the relation between I(4026) and beta is insensitive to differences in the surface gravity butsensitive to differences in the helium to hydrogen ratio. It is foundthat stars in the two groups most distant from the sun - h + chi Per andCepOBIII - have a lower helium abundance than stars in the solarneighborhood.

Vitesses radiales dans 2 champs de petite latitude galactique.
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관측 및 측정 데이터

별자리:페르세우스자리
적경:02h26m16.25s
적위:+57°04'06.9"
가시등급:8.849
거리:602.41 파섹
적경상의 고유운동:-1
적위상의 고유운동:-4.5
B-T magnitude:9.078
V-T magnitude:8.868

천체목록:
일반명   (Edit)
HD 1989HD 14900
TYCHO-2 2000TYC 3694-1764-1
USNO-A2.0USNO-A2 1425-03432197
HIPHIP 11361

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