Home Page       Updated on December 16, 2020

MisV1222     Profile MisV1222 = V1001 Cas R.A. 23h50m17s.12 Decl. +51o11'29".1 (2000.0) Mag. 13.61-14.71C Type EB: Period 0.4288 Epoch 2452937.0855 = 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 Digitized Sky Survey GIF image (15 x 15 arcmin) SIMBAD Query AAVSO VSX Database ASAS-3 Light Curve Discovery Information 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. Special Notes 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. Reports on New Discoveries IBVS 5600 Nakajima, K.; Yoshida, S.; Ohkura, N. Kazuhiro Nakajima's observations Visual and CCD minima of eclipsing binaries during 2003 Variable Star Bulletin No.42 Kazuo Nagai Light Curve New beta Lyr-type eclipsing variable MisV1222 Nakajima, K.; Yoshida, S.; Ohkura, N. Observations by MISAO Project Date Mag Filter Observer 2000 Aug. 7.59244 13.28 C Nobuo Ohkura 2000 Aug. 7.59429 13.31 C Nobuo Ohkura 2000 Nov. 27.41006 13.31 C Nobuo Ohkura 2000 Nov. 27.41191 13.22 C Nobuo Ohkura 2000 Nov. 27.41376 13.26 C Nobuo Ohkura 2000 Nov. 27.41561 13.38 C Nobuo Ohkura 2001 Oct. 2.56747 13.25 C Nobuo Ohkura 2001 Oct. 2.56943 13.33 C Nobuo Ohkura 2001 Oct. 2.57140 13.30 C Nobuo Ohkura 2001 Oct. 18.53090 13.53 C Nobuo Ohkura 2001 Oct. 18.53287 13.48 C Nobuo Ohkura 2001 Oct. 19.53571 13.44 C Nobuo Ohkura 2001 Oct. 29.48009 14.37 C Nobuo Ohkura 2001 Oct. 29.48207 14.25 C Nobuo Ohkura 2001 Oct. 29.48403 14.39 C Nobuo Ohkura 2001 Oct. 29.48601 14.39 C Nobuo Ohkura 2001 Nov. 20.45954 13.26 C Nobuo Ohkura 2001 Nov. 20.46150 13.26 C Nobuo Ohkura 2001 Nov. 20.46346 13.34 C Nobuo Ohkura