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HD 89876


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CCD measurements of visual binaries
CCD measurements of visual double stars were obtained with the ESO 1.5 mdanish reflector. All binaries observed are candidates for the HIPPARCOSInput Catalogue. More than 400 observations have been made in four clearnights. The accuracy obtained is comparable to the accuracy of thephotographic technique, but the observing and reduction times are oneorder of magnitude smaller.

UVBY H-beta photometry of UV-bright stars
uvby H-beta photometry is presented for 90 stars taken from an earlyversion of the Carnochan and Wilson (1983) catalogue of stars that havevery negative UV colors. Two have definite UV excesses (HD 36629, and HD81307). Four early-B stars have UV colors too positive for their visibleclassification, and beta-indices that indicate higher luminosities thanappear possible on galactic distribution grounds. Six late-B starsappear to have discordant flux distributions for which there are noobvious explanations. It is suggested that the high population ofsubluminous stars derived by Carnochan and Wilson is the product of thestatistical treatment used and the extreme patchiness in theinterstellar absorption, which gives rise to large numbers oflittle-reddened stars.

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Osservazione e dati astrometrici

Costellazione:Carena
Ascensione retta:10h20m23.65s
Declinazione:-63°20'12.1"
Magnitudine apparente:7.955
Distanza:606.061 parsec
Moto proprio RA:-13.1
Moto proprio Dec:3.4
B-T magnitude:7.928
V-T magnitude:7.953

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 89876
TYCHO-2 2000TYC 8960-1650-1
USNO-A2.0USNO-A2 0225-08161674
HIPHIP 50619

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