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    New beta Lyr-type eclipsing variable MisV1222    

November 3, 2003
Nakajima, K.; Yoshida, S.; Ohkura, N.

We discovered a new beta Lyr-type eclipsing variable MisV1222.

MisV1222, R.A. 23h50m17s.12, Decl. +51o11'29".1 (J2000.0), is a new variable star discovered in the course of the MISAO Project from Nobuo Ohkura's unfiltered CCD images taken between 2000 Aug. 7 and 2001 Nov. 20.

Kazuhiro Nakajima revealed that MisV1222 is a beta Lyr-type eclipsing variable with unfiltered CCD variations of 13.61 mag at maximum, 14.71 mag at primary minimum, 14.06 mag at secondary minimum, and period of 0.4288 days.

Nakajima observed it on 6 nights between Oct. 18 and 26 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 0.4288 days from these minima.

Here is the light curve of MisV1222 from total 507 observations. Comparison star is TYC2-3651.0293.1, R.A. 23h50m51.5s, Decl. +51o11'10" (2000.0), 11.98 mag(V). The phases on the figure were calculated by the ephemeris:

Primary minimum HJD = 2452937.0855 + 0d.4288 x E

[vsnet-newvar 2271]

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