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HD 76921


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관련 글

Classification of Population II supergiants and related stars in the Vilnius system
The results of photometric classification in the Vilnius system of 117Population II supergiants, suspected supergiants, and related stars aregiven. Their photometric spectral types, intrinsic color indices (Y-V)0,color excesses E(Y-V), metallicities Fe/H, and absolute magnitudes MVare determined. It is shown that the system allows us to detect the UUHerculis-type supergiants photometrically. The analyzed SRd star samplefalls into two groups of metallicity and luminosity. Our photometricclassification assigns luminosity classes from III to V to 37 F-K starswith /b/ greater than 16 deg classified by Bartaya (1979) from objectiveprism spectra as supergiants.

JHK photometry of population I CN-rich field giants
IR JHK photometry has been obtained for a sample of CN-rich field redgiants. It is found that these giants segregate according to metallicityor CN band strength in the (J-H), (H-K) two-color diagram. A delta (H-K)color-excess index is presented, which correlates with the strength ofthe 4215 wavelength CN band as measured by the delta C(m) index of theDDO photometric system (McClure, 1970). The sensitivity of delta (H-K)as a metal abundance indicator is shown to be relatively small. It issuggested that the CN-rich field giants have colors comparable to manyof the metal-rich giants in the Galactic bulge studied by Whitford andRich (1983), although a few of the bulge giants appear to have higherabundances.

The Bibliographical Star Index
Not Available

Stars with Strong Cyanogen Absorption
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1971ApJ...163...75S&db_key=AST

A photoelectric investigation of strong cyanogen stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1970AJ.....75...41M&db_key=AST

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관측 및 측정 데이터

별자리:큰곰자리
적경:09h01m53.57s
적위:+59°24'58.4"
가시등급:7.872
거리:231.481 파섹
적경상의 고유운동:-18.4
적위상의 고유운동:-19.4
B-T magnitude:9.215
V-T magnitude:7.983

천체목록:
일반명   (Edit)
HD 1989HD 76921
TYCHO-2 2000TYC 3811-1445-1
USNO-A2.0USNO-A2 1425-07262830
HIPHIP 44345

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