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TYC 4155-249-1

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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.
Measurements of binary stars performed at Nice (Second series) Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1984A&AS...57..467M&db_key=AST
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
Mesures d'etoiles doubles faites a Nice. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978A&AS...33..275M&db_key=AST
Mesures d'etoiles doubles a Meudon (3eme et derniere serie). Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1976A&AS...23..205M&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Orsa Maggiore
Ascensione retta:	12^h19^m39.95^s
Declinazione:	+62Â°29'01.5"
Magnitudine apparente:	10.134
Moto proprio RA:	-23.6
Moto proprio Dec:	0.9
B-T magnitude:	10.653
V-T magnitude:	10.177

Cataloghi e designazioni:

Nomi esatti	(Edit)
TYCHO-2 2000	TYC 4155-249-1
USNO-A2.0	USNO-A2 1500-05540778
HIP	HIP 60108

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