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HD 87956

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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.
Observations of Double Stars. XVIII. Micrometer observations of 1350 pairs in 1995-1997 are listed.
Mesures d'etoiles doubles faites aux lunettes de 74 et 50 CM de l'Observatoire de la Cote d'Azur We give 657 measurements of double stars, Table 1 by R. Gili with CCDcamera, Table 2 by P. Couteau with filar micrometer. Tables 1 and 2 areonly available in electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html.
Measurements of binary stars made at Nice Results are presented for 753 measurements of 267 binary stars that weremade with the 50- and 74-cm refractors at Nice Observatory. Coordinatesfor the equinox of 1950 are provided, along with apparent magnitudes,spectral types, and probable periods. It is noted that three-quarters ofthese systems are recently discovered close binaries.
Micrometer observations of double stars.8. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975ApJS...29..315H&db_key=AST
Mikrometermessungen von Doppelsternen. VI. Not Available
Mesures d'étoiles doubles effectuées au réfracteur de 38 cm de l'Observatoires de Nice Not Available

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Osservazione e dati astrometrici

Costellazione:	Leone
Ascensione retta:	10^h09^m04.77^s
Declinazione:	+25Â°31'03.0"
Magnitudine apparente:	9.174
Moto proprio RA:	2.7
Moto proprio Dec:	-56.5
B-T magnitude:	9.915
V-T magnitude:	9.236

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 87956
TYCHO-2 2000	TYC 1971-955-1
USNO-A2.0	USNO-A2 1125-06054230
HIP	HIP 49719

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