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HD 256097


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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 and new pairs. XV
The study reports visual and photographic measures listed for 1150 pairsobtained in the time frame 1989.91-1992.15, including 221 new doublestars. Magnitudes were estimated for a part of the objects, especiallythe fainter ones. Plate orientations were calculated from field stars ofknown positions and were precessed to the epoch; numbers of nights andof measured exposures are given. Reobservation of faint, neglected pairsreveal many corrections to the data from the old discovery lists.

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Osservazione e dati astrometrici

Costellazione:Auriga
Ascensione retta:06h23m39.79s
Declinazione:+32°19'58.2"
Magnitudine apparente:9.282
Moto proprio RA:-13.9
Moto proprio Dec:-26
B-T magnitude:9.714
V-T magnitude:9.318

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 256097
TYCHO-2 2000TYC 2425-359-1
USNO-A2.0USNO-A2 1200-04716586
HIPHIP 30411

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