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HD 47427


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관련 글

CCD astrometry and UBV photometry of visual binaries. II. Visual double stars with mainly G - type primaries and relatively small angular separation
Differences Delta V of magnitude and Delta (B-V) and Delta (U-B)colours, as well as separations and position angles of 42 relativelyclose double stars are presented. The selection criteria of our sampleare: the relatively small separation (between 2.5 and 5 arcseconds),magnitude difference under 1.25 mag, and mainly G-type primaries. TheCCD observations, performed at the 90 cm Dutch telescope at ESO, weremade using the Bessel U, B and V filters; the astrometry was done in theV filter only. From the analysis of the photometric data we concludethat 16 binaries in our sample have components with practically the sameT_eff, since they have almost the same colours; one binary hascomponents with identical characteristics. We also note the goodinternal accuracy of the astrometric CCD measurements. Based onobservations made at ESO La Silla, Chile.

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관측 및 측정 데이터

별자리:용골자리
적경:06h35m36.35s
적위:-52°20'21.7"
가시등급:9.038
적경상의 고유운동:-6.4
적위상의 고유운동:0.4
B-T magnitude:9.495
V-T magnitude:9.076

천체목록:
일반명   (Edit)
HD 1989HD 47427
TYCHO-2 2000TYC 8116-335-1
USNO-A2.0USNO-A2 0375-02630499
HIPHIP 31482

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