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Two-colour observations of RR Lyrae variables
Light curves, periods, ephemerides, and finding charts are presented forfour RR Lyrae stars (SV Volantis, DH Virginis, GS Hydrae, and VXSculptoris) observed in the V and B bands at Sutherland, South Africa.The periods were determined by computer and the mean radii were derivedusing the modified Baade-Wesselink method of Woolley and Savage. Theresults show that the light curve of SV Volantis appears not to repeatfrom cycle to cycle and that the other three stars are ordinary a-typeRR Lyrae variables. The B magnitude of VX Sculptoris is found to befainter than that given in the General Catalog of Variable Stars.
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Observation and Astrometry data
| Constellation: | Virgo |
| Right ascension: | 12h40m08.81s |
| Declination: | +06°10'21.9" |
| Apparent magnitude: | 9.67 |
| Proper motion RA: | -72.3 |
| Proper motion Dec: | 5.5 |
| B-T magnitude: | 10.309 |
| V-T magnitude: | 9.723 |
Catalogs and designations:
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NEWS@SKY (Science&Space News)
