Photoelectric observations of BV 690

Details Photoelectric observations of BV 690 Photoelectric observations of BV 690

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nohic....r...1s&link_type=abstract

Nizamiah and JAPAL - Rangapur Observatories Hyderabad, India, Contributions, no. 25, June 1990, p. 1-21.

Other

Electrophotometry, Light Curve, Stellar Color, Stellar Magnitude, Ubv Spectra, Variable Stars, Astronomical Observatories, Astronomical Photography, Earth Atmosphere, Night Sky, Reference Stars

Scientific paper

Photoelectric observations of the star BV 690 are reported and compared to the results of photographic observations. The object is observed in the B and V colors of Johnson and Morgan's UBV system with a photomultiplier photometer, and observations of other stars are made for comparison. The magnitude differences are given for BV 690, and the star is concluded to be a cepheid-type variable for which Tmax = Hel.J.D. 2442359.490 + 1.2400 E.

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