Home Page Updated on September 4, 2017
MisV1222 = V1001 Cas
= GSC 3651-00655 23h50m17s.02 +51o11'29".0 Error:0.2" Mag:14.06 Ma gError:0.43 Band:1 Class:0 Plate:031J Flag:T Epoch:09 SEP 1983 = GSC 3651-00655 23h50m17s.06 +51o11'29".0 Error:0.2" Mag:14.38 Ma gError:0.42 Band:1 Class:0 Plate:01WL Flag:T Epoch:15 SEP 1983 = USNO-A2.0 1350.18742581 23h50m16s.853 +51o11'29".83 Mag(R):13.4 M ag(B):14.1
Seiichi Yoshida, MISAO Project; Nobuo Ohkura, Okayama, Japan; and Kazuhiro Nakajima, Mie, Japan, discovered a new variable star MisV1222.
It was picked up by Seiichi Yoshida from the candidates of new variable stars detected by the PIXY system 2 from images taken by Nobuo Ohkura, and confirmed by Kazuhiro Nakajima. The type, period and epoch were determined by Kazuhiro Nakajima.
The identification is researched by Taichi Kato (Kyoto University), Seiichi Yoshida, and other contributors.
Kazuhiro Nakajima's observations revealed it is a beta Lyr-type (EB) 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 (IBVS 5600).
Kazuo Nagai pointed out that it may be EA/RS type, a rare eclipsing variable with distortion wave outside eclipses. But the distortion in the light curve of MisV1222 is probably due to errors.
Research and Publication
New beta Lyr-type eclipsing variable MisV1222
Nakajima, K.; Yoshida, S.; Ohkura, N.
Observations by MISAO Project