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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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Observation and Astrometry data

Constellation:Cetus
Right ascension:01h34m51.32s
Declination:-03°31'26.0"
Apparent magnitude:6.437
Distance:251.256 parsecs
Proper motion RA:12.4
Proper motion Dec:-33.1
B-T magnitude:8.207
V-T magnitude:6.584

Catalogs and designations:
Proper Names
HD 1989HD 9690
TYCHO-2 2000TYC 4685-2207-1
USNO-A2.0USNO-A2 0825-00358947
HIPHIP 7362

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