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* Profile

MisV1262

R.A.22h24m06s.65
Decl.+54o45'33".4(2000.0)
Mag.12.5-14.5C
TypeM:
= IRAS 22221+5430  22h24m06s.2 +54o45'29"  Ellipse:18x8"  P.A.:92  Flu
  x(12):0.3635  Flux(25):0.1780  Flux(60):<1.352  Flux(100):<11.88  Va
  r:4%
= MSX5C G102.6786-02.2130  22h24m06s.46 +54o45'31".7  InScanError:2.9"
    CrossScanError:2.4"  Flux(A):0.23806
= GSC2.2 N0122113238856        Fmag 14.8 (red)   Jmag 17.8 (blue)

Digitized Sky Survey GIF image (15 x 15 arcmin)

SIMBAD Query

AAVSO VSX Database

ASAS-3 Light Curve

NSVS Light Curve (NSVS 3442991)

* Discovery Information

Seiichi Yoshida, MISAO Project; Nobuo Ohkura, Okayama, Japan; and Ken-ichi Kadota, MISAO Project, discovered a new variable star MisV1262.

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 Ken-ichi Kadota.

The identification is researched by Taichi Kato (Kyoto University), Seiichi Yoshida, and other contributors.

* Special Notes

It was announced as a possible semi-regular variable with a small amplitude at the discovery. But further observations revealed it is a Mira type variable with large amplitude.

Unexpectedly, V-band observations caught a 14.9 mag star at the position of MisV1262, when it faded down to 14.1 mag by unfiltered CCD observations. It was almost constant in V-band.

Investigating DSS images and USNO-B1.0 catalog revealed that there is a complex of three stars within 15 arcsec at the position of MisV1262, and a nearby star becomes brighter than MisV1262 in B-band and V-band. A 14.9 mag star in V-band images must be the nearby star.

The NSVS light curve also shows a rough variation of this star with a range of 12.8 - 14.1 mag. However, the NSVS data must be blending of the complex, and must not show the total variation.

* Research and Publication

* Light Curve

    12.4  +--------------------------------------------------------+
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    14.6  +--------------------------------------------------------+
       2451730                                                  2452969
     2000 July 4                                              2003 Nov. 25

* Observations by MISAO Project

DateMagFilterObserver
2000 Aug. 29.5294912.5CNobuo Ohkura
2000 Oct. 4.5087512.9CNobuo Ohkura
2000 Oct. 4.5106012.8CNobuo Ohkura
2000 Oct. 4.5124712.8CNobuo Ohkura
2000 Oct. 4.5143212.9CNobuo Ohkura
2001 Aug. 27.5954112.6CNobuo Ohkura
2001 Aug. 27.5972712.5CNobuo Ohkura
2001 Aug. 27.5991212.5CNobuo Ohkura
2001 Aug. 27.6009712.5CNobuo Ohkura
2001 Sept. 24.5296113.8CNobuo Ohkura
2001 Sept. 24.5306013.8CNobuo Ohkura
2001 Oct. 12.4976213.5CNobuo Ohkura
2001 Oct. 13.4769913.1CNobuo Ohkura
2001 Oct. 13.4789613.2CNobuo Ohkura
2001 Oct. 13.4809413.3CNobuo Ohkura
2003 Sept. 14.5576014.4CNobuo Ohkura
2003 Sept. 16.5450814.4CNobuo Ohkura
2003 Sept. 16.5470514.5CNobuo Ohkura
2003 Sept. 16.5490214.3CNobuo Ohkura
2003 Sept. 26.5170314.1CNobuo Ohkura
2003 Sept. 26.5189914.4CNobuo Ohkura
2003 Sept. 26.5209614.0CNobuo Ohkura
2003 Sept. 27.5043614.2CNobuo Ohkura
2003 Sept. 27.5063214.0CNobuo Ohkura
2003 Sept. 27.5082914.1CNobuo Ohkura
2003 Sept. 29.4991114.0CNobuo Ohkura
2003 Sept. 29.5010814.1CNobuo Ohkura
2003 Sept. 30.4862414.0CNobuo Ohkura
2003 Sept. 30.4882114.3CNobuo Ohkura
2003 Sept. 30.4901714.1CNobuo Ohkura

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