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HD 117540

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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.
Precision photometric monitoring of southern variable Wolf-Rayet stars with a comment on the overall continuum variability of WR stars Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1987AJ.....94.1008L&db_key=AST
A spectral survey of the southern Milky Way 1 : general description and catalogue 1 (l=306 -318 degrees). Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&AS...16..445S&db_key=AST

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:	Erbogan
Sað Açýklýk:	13^h32^m31.99^s
Yükselim:	-62Â°20'39.2"
Görünürdeki Parlaklýk:	8.124
Uzaklýk:	344.828 parsek
özdevim Sað Açýklýk:	-10.7
özdevim Yükselim:	-6.3
B-T magnitude:	8.21
V-T magnitude:	8.132

Kataloglar ve belirtme:

Özgün isimleri	(Edit)
HD 1989	HD 117540
TYCHO-2 2000	TYC 8995-880-1
USNO-A2.0	USNO-A2 0225-17186256
HIP	HIP 66056

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