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HD 151688


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Search for Beta Cephei stars south of declination -20 deg. II - Photometric and spectrographic observations of early B giants and subgiants - Winter objects
Results of the second part of a program begun in 1975 (Jerzykiewicz andSterken, 1977) are presented. Out of 39 Beta Cephei candidates observedphotometrically, seven turned out to vary with the b ranges exceeding0.020 m, while 21 have been found constant to within 0.010 m or better.For the 56 comparison stars these numbers are 6 and 25, respectively.From spectrographic observations one of the candidates, HD 129557 = HR5488 (B2 III), iis found to be a Beta Cephei variable with a period of0.135 d and the 2 K amplitude of 18.4 km/s. A comparison of the resultsof this program with other recent photometric searches for Beta Cepheivariables shows good agreement in most cases. There are severaldiscrepant stars, however. These are discussed in some detail. Aconclusion emerges that in the low temperature extension of the BetaCephei region, if such an extension exists at all, on-and-off typepulsations occur.

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Observation and Astrometry data

Constellation:さいだん座
Right ascension:16h52m08.99s
Declination:-57°34'49.2"
Apparent magnitude:7.13
Distance:283.286 parsecs
Proper motion RA:-4.1
Proper motion Dec:-11
B-T magnitude:7.065
V-T magnitude:7.125

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 151688
TYCHO-2 2000TYC 8721-2760-1
USNO-A2.0USNO-A2 0300-29803081
HIPHIP 82528

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