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HD 164257


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The 72nd Name-List of Variable Stars
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Three known and twenty-two new variable stars of early spectral type
Photoelectric photometry is reported of three known and 22 newvariables, all brighter than V = 7.5 mag. The three known ones are: theellipsoidal variable 42 (V467) Per, the Beta Cep-type star HR 6684 =V2052 Oph, and the eclipsing variable HR 8854 = V649 Cas. The newvariable stars are listed. They include two Beta Cep candidates, oneeclipsing and three ellipsoidal variables, a 'mid-B' variable, anAlpha(2) CVn variable, and two Lambda Eri stars. The twelve remainingnew variables could not be classified because of insufficient data. TheLambda Eri variables found in the present investigation, together withsome examples from the literature, indicate that rotational modulationoccurs not only in Be, but also in normal B stars.

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Observation and Astrometry data

Constellation:Ophiucus
Right ascension:18h00m07.32s
Declination:+06°33'14.1"
Apparent magnitude:6.784
Distance:157.729 parsecs
Proper motion RA:1.6
Proper motion Dec:-7.4
B-T magnitude:6.874
V-T magnitude:6.792

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 164257
TYCHO-2 2000TYC 442-1788-1
USNO-A2.0USNO-A2 0900-11189137
HIPHIP 88132

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