MISAO Project

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* Profile

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

Digitized Sky Survey GIF image (15 x 15 arcmin)


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

* Light Curve

New beta Lyr-type eclipsing variable MisV1222
Nakajima, K.; Yoshida, S.; Ohkura, N.

* Observations by MISAO Project

2000 Aug. 7.5924413.28CNobuo Ohkura
2000 Aug. 7.5942913.31CNobuo Ohkura
2000 Nov. 27.4100613.31CNobuo Ohkura
2000 Nov. 27.4119113.22CNobuo Ohkura
2000 Nov. 27.4137613.26CNobuo Ohkura
2000 Nov. 27.4156113.38CNobuo Ohkura
2001 Oct. 2.5674713.25CNobuo Ohkura
2001 Oct. 2.5694313.33CNobuo Ohkura
2001 Oct. 2.5714013.30CNobuo Ohkura
2001 Oct. 18.5309013.53CNobuo Ohkura
2001 Oct. 18.5328713.48CNobuo Ohkura
2001 Oct. 19.5357113.44CNobuo Ohkura
2001 Oct. 29.4800914.37CNobuo Ohkura
2001 Oct. 29.4820714.25CNobuo Ohkura
2001 Oct. 29.4840314.39CNobuo Ohkura
2001 Oct. 29.4860114.39CNobuo Ohkura
2001 Nov. 20.4595413.26CNobuo Ohkura
2001 Nov. 20.4615013.26CNobuo Ohkura
2001 Nov. 20.4634613.34CNobuo Ohkura

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