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HD 69238


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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.

Photoelectric photometry of late type stars in the direction opposed to galactic rotation
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&AS...16..269G&db_key=AST

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观测天体数据

星座:船帆座
右阿森松:08h14m18.41s
赤纬:-43°41'39.4"
视星:8.861
距离:97.276 天文距离
右阿森松适当运动:24.7
赤纬适当运动:44.1
B-T magnitude:9.619
V-T magnitude:8.924

目录:
适当名称   (Edit)
HD 1989HD 69238
TYCHO-2 2000TYC 7672-1925-1
USNO-A2.0USNO-A2 0450-06325491
HIPHIP 40350

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