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HD 89975


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VRI photometry of wide double stars with A- type primaries.
We are presenting VRI photometry of 93 wide visual double stars havinglate B- or A- type primaries, taken from the Annex of Double andMultiple Stars of the HIPPARCOS Input Catalogue. Spectral types havebeen estimated for most of the primaries and for the majority of thesecondaries. 40% of them probably have common origin components, forwhich we calculated photometric parallaxes and some orbital valuesestimates.

Visual measures of 193 double and multiple stars
Micrometer measurements of 174 double stars obtained with 26 1/2-in. and10-in. refractors are presented, along with interferometric measurementsof 19 double stars performed using 20-in. and 36-in. reflectors. Theresults reported include star coordinates, position angles, separations,probable errors, orbital residuals, and identifications of wide doubleswith separations of up to 2 arcmin.

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观测天体数据

星座:船底座
右阿森松:10h20m49.89s
赤纬:-67°31'14.2"
视星:8.832
距离:310.559 天文距离
右阿森松适当运动:-18.7
赤纬适当运动:7.5
B-T magnitude:8.973
V-T magnitude:8.844

目录:
适当名称   (Edit)
HD 1989HD 89975
TYCHO-2 2000TYC 9210-3430-1
USNO-A2.0USNO-A2 0150-07011597
HIPHIP 50670

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