Abstract
The circular elements of eclipsing binary MR Cygni in yellow and blue light are derived from both minima. The durations of eclipses are different and this is interpreted as an effect of orbital eccentricity. The elements deduced from one minimum and the depth of the other do not permit the construction of a theoretical light curve based on a spherical model which satisfies the other minimum. However, this might be feasible by introducing an appropriate value for the orbital eccentricity.
New ephemeris are obtained from the photoelectric minima.
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Battistini, P., Bonifazi, A. & Guarnieri, A. Evidence of orbital eccentricity from a new two-color light curve of MR Cygni. Astrophys Space Sci 19, 395–409 (1972). https://doi.org/10.1007/BF00645722
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DOI: https://doi.org/10.1007/BF00645722