CP Lacertae
1936 Nova seen in the constellation Lacerta
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Through Constellation, Italy and Poland
The nova reached a peak brightness of 2.1 mag, making it readily visible to the naked eye during night time. Following the outbreak, the brightness of CP Lacertae decreased thereafter, falling 3 magnitudes after nine days. It is classified as a very fast nova, with a smooth light curve.
Located at an estimated distance of 3.8 kly (1.16 kpc), this is a close binary system with a degenerate white dwarf primary in orbit with a cool red dwarf secondary over a period of 0.145143 days. Matter from the red dwarf is being drawn off onto an accretion disk orbiting the white dwarf. The mean brightness of the system varies with an amplitude of 0.5 magnitude from day to day. The observational data shows a general period of 0.037 days, which may be related to the rotation period of the white dwarf component.
Unlike many novae, CP Lacertae does not have a shell visible as a nebula with optical telescopes.