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HD 250684


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ICCD speckle observations of binary stars. III - A survey for duplicity among high-velocity stars
An analysis of speckle interferometry data for 182 stars has resulted inthe detection of 10 binaries, four of which are newly resolved systems.After correcting for selection effects, the data are found to becompatible with a total frequency for high-velocity long-period doubleswhich is as large as that for low-velocity stars. Based on spectroscopicparallaxes and visual magnitudes, these binaries are found to be within100 pc of the sun, with eight having linear separations of less than 20AU. Four of the binaries are determined to have periods of less than 20yr.

Vitesses radiales dans 4 champs de petite latitude galactique.
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Osservazione e dati astrometrici

Costellazione:Gemelli
Ascensione retta:06h03m07.54s
Declinazione:+27°26'25.7"
Magnitudine apparente:9.731
Moto proprio RA:1.9
Moto proprio Dec:-5.9
B-T magnitude:9.933
V-T magnitude:9.748

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 250684
TYCHO-2 2000TYC 1872-1378-1
USNO-A2.0USNO-A2 1125-03256963
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