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    New W UMa-type eclipsing variable MisV1239    

December 10, 2003
Nakajima, K.; Yoshida, S.; Ohkura, N.

We discovered a new W UMa-type eclipsing variable MisV1239.

MisV1239, R.A. 00h12m02s.69, Decl. +55o05'19".6 (J2000.0), is a new variable star discovered in the course of the MISAO Project from Nobuo Ohkura's unfiltered CCD images taken between Sept. 13 and 22 in 2003.

Kazuhiro Nakajima revealed that MisV1239 is a W UMa-type eclipsing variable with unfiltered CCD variations of 11.97 mag at maximum, 12.61 mag at primary minimum, 12.47 mag at secondary minimum, and period of 1.0650 days.

Nakajima observed it on 10 nights between Oct. 8 and Nov. 16 in 2003 with 0.25-m f/5 Schmidt-Cassegrain and CV-04 CCD, and caught four minima.

MinimumHJDError of HJD

The period is derived as 1.0650 days from these minima.

Here is the light curve of MisV1239 from total 1333 observations. Comparison star is GSC3656.746, R.A. 00h11m53.4s, Decl. +55o05'21" (2000.0), 11.87 mag. The phases on the figure were calculated by the ephemeris:

Primary minimum HJD = 2452960.2298 + 1d.0650 x E

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