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HD 77277

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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.
Micrometer Observations of Double Stars and New Pairs - Part Ten Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980ApJS...44..111H&db_key=AST
Spectral and Luminosity Classification of the Bright Sequence Stars in the C Regions. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1955ApJ...121...32N&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Cancro
Ascensione retta:	09^h02^m02.43^s
Declinazione:	+14Â°35'55.1"
Magnitudine apparente:	8.748
Distanza:	156.495 parsec
Moto proprio RA:	-25.3
Moto proprio Dec:	-13.8
B-T magnitude:	9.3
V-T magnitude:	8.794

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 77277
TYCHO-2 2000	TYC 818-958-1
USNO-A2.0	USNO-A2 0975-06127087
HIP	HIP 44361

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