Abstract
B andV observations of the suspected variable BV 690 = NSV 04298 are reported. The star shows light variations with a period of ld.2400 and with amplitudes of 0m.27, 0m.36 and 0m.11 inV, B, andB-V respectively. The light curves show steeper rise than decline, and there is evidence for the presence of a bump in the descending branch around the phase of 0.35. From considerations of the period, spectral type, presence of the bump and high tangential velocity we conclude that BV 690 belongs to the BL Herculis class of Typen Cepheids
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Sanwal, N.B., Sarma, M.B.K. BV 690, a new bright Type II Cepheid. J Astrophys Astron 12, 119–131 (1991). https://doi.org/10.1007/BF02709301
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DOI: https://doi.org/10.1007/BF02709301