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HD 39210


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Ultraviolet and optical studies of binaries with luminous cool primaries and hot companions. II - BVRI observations
Johnson system BVRI measurements are presented for 117 stars, most ofthem with no previous R and I photometry and many with no previous B andV. The prime objects for measurement are unresolved or nearly unresolvedbinaries containing a late-type giant or supergiant and an early-typecompanion. Other objects on the program include suspected binaries andother F-G giants and supergiants lacking at least R and I magnitudes.The variable F and G supergiants 1 Mon, 89 Her, HR 7308, HR 8157, HR8752, and rho-Cas and the eclipsing systems W Ser and ST Aqr wereobserved; HR 8752 showed significant dimming and cooling over 125 days.Several of Halliwell's (1979) candidates for nearby stars were measured.

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Osservazione e dati astrometrici

Costellazione:Orione
Ascensione retta:05h51m27.08s
Declinazione:+10°15'08.9"
Magnitudine apparente:8.824
Distanza:234.742 parsec
Moto proprio RA:-4.9
Moto proprio Dec:-7.2
B-T magnitude:8.866
V-T magnitude:8.828

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 39210
TYCHO-2 2000TYC 719-266-1
USNO-A2.0USNO-A2 0975-02118365
HIPHIP 27664

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