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TYC 6421-339-1


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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.

The South Galactic Pole - Results from uvby-beta photometry of 572 O-F stars
Photometric observations on the uvby-beta system are presented for 572O-F stars within about 20 deg of the South Galactic Pole. Theinterstellar extinction near the pole is found to be zero out to 400 pcfrom the sun, in agreement with the H I maps of Burstein and Heiles(1982). Several evolved and Population II objects are identified.

Measures of double stars.
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Osservazione e dati astrometrici

Costellazione:Balena
Ascensione retta:00h41m03.96s
Declinazione:-23°08'54.4"
Magnitudine apparente:9.598
Moto proprio RA:19.7
Moto proprio Dec:1.4
B-T magnitude:10.117
V-T magnitude:9.641

Cataloghi e designazioni:
Nomi esatti   (Edit)
TYCHO-2 2000TYC 6421-339-1
USNO-A2.0USNO-A2 0600-00272129
HIPHIP 3226

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