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HD 57139


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관련 글

Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.

The calibration of the Stromgren photometric system for A, F and early G supergiants. I - The observational data
An empirical calibration of the Stromgren uvby-beta photometric systemfor the A, F, and early G supergiants is being derived. This paperexplains the observational program and the photometric reductiontechniques used and presents a catalog of new Stromgren photometry forover 600 A, F, and G supergiants.

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관측 및 측정 데이터

별자리:큰개자리
적경:07h19m18.41s
적위:-17°31'29.5"
가시등급:6.71
거리:383.142 파섹
적경상의 고유운동:-7.2
적위상의 고유운동:4.1
B-T magnitude:6.677
V-T magnitude:6.708

천체목록:
일반명   (Edit)
HD 1989HD 57139
TYCHO-2 2000TYC 5969-1293-1
USNO-A2.0USNO-A2 0675-05540271
HIPHIP 35468

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