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HD 57790


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Mesures et decouvertes d'etoiles doubles effectuees a la lunette de 50cm de l'Observatoire de Nice. Measures and discoveries of visual double stars made with the 50cm refractor at the Nice Observatory.
Measures and discoveries of visual double stars made at the Observatoirede la Cote d'Azur at Nice, between 1988 and 1994, with the 50cmrefractor equipped with a filar micrometer and electronic recordingdevice. The programs proposed by J. Dommanget involve the complement ofthe C.C.D.M. (resolving problems of identification of double stars andof coherency in the Index) and the INput CAtalog Hipparcos (resolutionof ambiguities on the binarity and on the position of certain doublestars which have seldom or never been observed again from the epoch ortheir discovery). The author has discovered three new binaries: JCT1,JCT2 and JCT3.

Double star observations made with the 28-inch refractor 1963-1970.
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Vitesses radiales dans 4 champs de petite latitude galactique.
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Observation and Astrometry data

Constellation:Λυγξ
Right ascension:07h24m52.22s
Declination:+44°51'06.9"
Apparent magnitude:7.906
Distance:200.803 parsecs
Proper motion RA:-0.9
Proper motion Dec:-29.3
B-T magnitude:9.409
V-T magnitude:8.031

Catalogs and designations:
Proper Names
HD 1989HD 57790
TYCHO-2 2000TYC 2969-628-1
USNO-A2.0USNO-A2 1275-06907571
HIPHIP 35978
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