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HD 9690


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Research Note Hipparcos photometry: The least variable stars
The data known as the Hipparcos Photometry obtained with the Hipparcossatellite have been investigated to find those stars which are leastvariable. Such stars are excellent candidates to serve as standards forphotometric systems. Their spectral types suggest in which parts of theHR diagrams stars are most constant. In some cases these values stronglyindicate that previous ground based studies claiming photometricvariability are incorrect or that the level of stellar activity haschanged. Table 2 is only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/367/297

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观测天体数据

星座:鯨魚座
右阿森松:01h34m51.32s
赤纬:-03°31'26.0"
视星:6.437
距离:251.256 天文距离
右阿森松适当运动:12.4
赤纬适当运动:-33.1
B-T magnitude:8.207
V-T magnitude:6.584

目录:
适当名称
HD 1989HD 9690
TYCHO-2 2000TYC 4685-2207-1
USNO-A2.0USNO-A2 0825-00358947
HIPHIP 7362

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