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HD 7919


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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.

First experience in automatic spectral classification related to the MEGA program
The results of automatic quantitative spectral classification of starsin field No. 10 (alpha-1950 = 1 h 18 m, delta-1950 = + 3 deg 13 min) ofthe MEGA program are presented. Some tentative stellar-statisticalresults are discussed.

Micrometer Measures of Double Stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1959ApJS....4...45V&db_key=AST

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Baliklar
Sað Açýklýk:01h18m52.38s
Yükselim:+04°39'13.6"
Görünürdeki Parlaklýk:7.638
Uzaklýk:158.73 parsek
özdevim Sað Açýklýk:-12.6
özdevim Yükselim:-5.1
B-T magnitude:7.828
V-T magnitude:7.654

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 7919
TYCHO-2 2000TYC 23-461-1
USNO-A2.0USNO-A2 0900-00308630
HIPHIP 6142

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