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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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Osservazione e dati astrometrici

Costellazione:Vele
Ascensione retta:08h14m18.41s
Declinazione:-43°41'39.4"
Magnitudine apparente:8.861
Distanza:97.276 parsec
Moto proprio RA:24.7
Moto proprio Dec:44.1
B-T magnitude:9.619
V-T magnitude:8.924

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 69238
TYCHO-2 2000TYC 7672-1925-1
USNO-A2.0USNO-A2 0450-06325491
HIPHIP 40350

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