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* Profile

MisV1441

R.A.20h50m50s.42
Decl.+44o50'11".7(2000.0)
Mag.14.66-17.65R
TypeINSB?
= HBHA 50-20  20h50m50s.4 +44o50'11"
= IPHAS J205050.39+445011.7  em R=14.796 R-I=1.359 R-Ha=1.103 k UC/Em*
   MNRAS384,1277
= MSX5C G084.9753+00.4229  20h50m50s.30 +44o50'10".3  InScanError:1.8"
    CrossScanError:1.7"  Flux(A):0.93042(var)  Flux(D):1.1963  Flux(E)
  :3.1848
= 2MASS 20505039+4450115  15.412(J)  13.104(H)  11.103(Ks)

Digitized Sky Survey GIF image (15 x 15 arcmin)

SIMBAD Query

AAVSO VSX Database

ASAS-3 Light Curve

* Discovery Information

Seiichi Yoshida, MISAO Project; Youichirou Nakashima, Okayama, Japan, discovered a new variable star MisV1441.

It was picked up as one of the nova candidates from Youichirou Nakashima (Okayama, Japan)'s unfiltered CCD images on 2008 May 20 by the PIXY System 2. Yoshida checked Nakashima and Nobuo Ohkura (Okayama, Japan)'s CCD images between 2001 and 2007, and found it is a variable. Its variation was confirmed by Nakashima.

Yoshida identified it with an H-alpha emission star HBHA 50-20. Yoshida also investigated the 2MASS data, and found it is fairly faint in the J-band image, fainter than our unfiltered CCD images, although the color is very red and bright in the Ks-band image.

Patrick Wils and Taichi Kato pointed out that it is identified with an H alpha emission source IPHAS J205050.39+445011.7.

Taichi Kato also pointed out that it is in a star forming region SFR G85.49-1.00, and this star seems to be a T Tau variable (possibly INSB type).

* Special Notes

Seiichi Yoshida, Patrick Wils and Taichi Kato identified it with an H-alpha emission source HBHA 50-20 = IPHAS J205050.39+445011.7.

Seiichi Yoshida investigated the 2MASS data, and found it is fairly faint in the J-band image, fainter than our unfiltered CCD images, although the color is very red and bright in the Ks-band image.

Taichi Kato also pointed out that it is in a star forming region SFR G85.49-1.00, and this star seems to be a T Tau variable (possibly INSB type).

Diego Rodriguez and Adolfo San Segundo Delgado reported that the color is very red as V-R = 1.6 mag.

It faded rapidly from 14.69 mag to 17.26 mag within 3 months in 2009, and from 15.24 mag to 17.28 mag within one month and a half in 2010.

It is brightening rapidly in 2011 up to 14.66 mag, approaching to the brightest record ever.

Short term variation was detected by time series photometry by Hidehiko Akazawa on Nov. 16, 2011.

* Research and Publication

* Light Curve


* Recent Observations

2013 Sept.13.927  14.92  CV  Adolfo San Segundo
2013 Sept.13.927  14.53  CR  Adolfo San Segundo
2013 Sept.11.909  15.24  CV  Adolfo San Segundo
2013 Sept.11.909  14.86  CR  Adolfo San Segundo
2013 Aug. 26.979  15.17  CV  Adolfo San Segundo
2013 Aug. 26.979  14.79  CR  Adolfo San Segundo
2012 Dec. 23.753  14.96  R   Diego Rodriguez
2012 Dec.  9.753  15.08  R   Diego Rodriguez
2012 Nov. 22.774  15.05  R   Diego Rodriguez
2012 Nov.  6.808  14.89  R   Diego Rodriguez
2012 Oct. 28.813  15.15  CV  Adolfo San Segundo
2012 Oct. 28.801  14.82  R   Diego Rodriguez
2012 Oct. 21.867  14.82  R   Diego Rodriguez
2012 Oct. 13.889  15.13  R   Diego Rodriguez
2012 Oct.  4.890  15.35  R   Diego Rodriguez
2012 Sept.18.901  15.00  R   Diego Rodriguez
2012 Sept.14.932  15.36  CV  Adolfo San Segundo
2012 Sept.11.893  15.73  R   Diego Rodriguez
2012 Aug. 26.924  16.10  R   Diego Rodriguez
2012 Aug. 22.927  16.10  R   Diego Rodriguez
2012 Aug. 16.973  15.78  CV  Adolfo San Segundo
2012 Aug. 16.973  15.40  CR  Adolfo San Segundo
2012 Aug.  6.950  16.08  R   Diego Rodriguez
2012 July 20.060  15.61  CR  Adolfo San Segundo
2012 July 17.006  15.26  CR  Adolfo San Segundo
2012 July 15.032  15.49  R   Diego Rodriguez
2012 June 23.032  15.34  CR  Adolfo San Segundo
2011 Dec. 18.790  15.82  R   Diego Rodriguez
2011 Dec.  6.776  15.15  R   Diego Rodriguez
2011 Nov. 27.778  14.99  R   Diego Rodriguez
2011 Nov. 24.949  14.77  CR  Faustino Garcia
2011 Nov. 23.800  15.01  R   Diego Rodriguez
2011 Nov. 12.774  14.69  R   Diego Rodriguez
2011 Oct. 28.799  14.66  CR  Diego Rodriguez
2011 Aug.  8.916  15.96  R   Diego Rodriguez
2011 July 19.992  16.38  R   Adolfo San Segundo
2010 Dec. 18.840  17.65  CR  Esteban Reina Lorenz
2010 Dec. 18.840  18.13  CV  Esteban Reina Lorenz
2010 Nov. 20.766  16.99  CR  Esteban Reina Lorenz
2010 Nov. 15.801  17.20  R   Diego Rodriguez
2010 Nov. 13.807  17.28  R   Esteban Reina Lorenz
2010 Nov.  4.859  16.94  R   Diego Rodriguez
2010 Nov.  3.857  16.84  R   Diego Rodriguez
2010 Oct. 20.015  16.26  R   Miguel Rodriguez Marco
2010 Oct. 20.010  16.23  CR  Miguel Rodriguez Marco
2010 Oct. 16.876  15.97  R   Diego Rodriguez
2010 Oct. 15.031  16.51  CR  Miguel Rodriguez Marco
2010 Oct.  3.078  15.48  CR  Miguel Rodriguez Marco
2010 Sept.25.060  15.24  CR  Miguel Rodriguez Marco
2010 Sept.14.071  15.88  CR  Miguel Rodriguez Marco
2010 Sept.11.963  16.77  V   Esteban Reina Lorenz
2010 Sept.11.949  15.59  R   Esteban Reina Lorenz
2010 Sept.11.935  15.99  CV  Esteban Reina Lorenz
2010 Sept. 9.082  15.96  CR  Miguel Rodriguez Marco
2010 Sept. 5.105  15.85  CR  Miguel Rodriguez Marco
2010 Sept. 3.939  16.20  R   Diego Rodriguez
2010 Sept. 3.916  15.93  R   Adolfo San Segundo
2010 Aug. 28.984  15.82  R   Adolfo San Segundo
2010 Aug. 27.989  15.95  R   Adolfo San Segundo
2010 Aug. 24.983  15.93  R   Adolfo San Segundo
2010 Aug. 24.940  16.10  R   Diego Rodriguez
2010 Aug. 24.860  15.81  R   Esteban Reina Lorenz
2010 Aug. 24.851  15.76  CR  Esteban Reina Lorenz
2010 Aug. 23.985  16.11  R   Adolfo San Segundo
2010 Aug. 20.972  15.72  R   Adolfo San Segundo
2010 July 31.166  16.30  CR  Miguel Rodriguez Marco
2010 July 29.926  16.28  CR  Diego Rodriguez
2010 July  5.003  15.86  CR  Adolfo San Segundo
2010 May  17.156  15.68  R   Adolfo San Segundo
2010 May  17.149  15.56  CR  Adolfo San Segundo

* Observations by MISAO Project

DateMagFilterObserver
2001 July 19.6333015.6CNobuo Ohkura
2001 July 19.6351515.5CNobuo Ohkura
2001 Oct. 14.4210915.5CNobuo Ohkura
2001 Oct. 14.4230615.3CNobuo Ohkura
2007 Aug. 24.6044115.8CYouichirou Nakashima
2007 Sept. 7.5601215.7CYouichirou Nakashima
2007 Sept. 19.5197915.9CYouichirou Nakashima
2007 Sept. 19.5218515.7CYouichirou Nakashima
2007 Sept. 25.5897815.8CYouichirou Nakashima
2007 Oct. 5.5314815.4CYouichirou Nakashima
2007 Oct. 5.5335415.5CYouichirou Nakashima
2008 May 20.6289014.4CYouichirou Nakashima
2008 May 20.6309414.7CYouichirou Nakashima
2008 July 3.6059614.6CYouichirou Nakashima
2008 July 3.6080014.5CYouichirou Nakashima
2008 July 3.6100314.5CYouichirou Nakashima
2008 July 31.6968115.0CYouichirou Nakashima
2008 July 31.6988415.0CYouichirou Nakashima
2008 Sept. 8.5482215.0CYouichirou Nakashima
2008 Sept. 8.5502415.1CYouichirou Nakashima
2008 Sept. 8.5522715.1CYouichirou Nakashima
2010 Sept. 16.55938[15.6CYouichirou Nakashima
2010 Nov. 17.42639[16.7CYouichirou Nakashima
2010 Nov. 17.42773[16.6CYouichirou Nakashima
2010 Nov. 17.42906[16.1CYouichirou Nakashima
2011 Sept. 10.5331515.5CYouichirou Nakashima
2011 Sept. 10.5344915.6CYouichirou Nakashima
2011 Sept. 23.5478215.3CYouichirou Nakashima
2011 Sept. 23.5491715.3CYouichirou Nakashima
2011 Sept. 23.5505115.4CYouichirou Nakashima
2011 Oct. 18.4687714.6CYouichirou Nakashima
2011 Oct. 18.4701214.6CYouichirou Nakashima
2011 Oct. 18.4714514.6CYouichirou Nakashima
2011 Nov. 16.40014.84CHidehiko Akazawa
2011 Dec. 16.4034616.2CYouichirou Nakashima
2012 June 3.61793[15.0CYouichirou Nakashima
2012 June 3.61928[15.0CYouichirou Nakashima
2012 June 3.62065[15.0CYouichirou Nakashima
2012 June 3.62200[15.0CYouichirou Nakashima
2012 June 13.58206[15.5CYouichirou Nakashima
2012 June 13.58341[15.5CYouichirou Nakashima
2012 June 13.58478[15.5CYouichirou Nakashima
2012 June 13.58613[15.5CYouichirou Nakashima
2012 June 13.58749[15.5CYouichirou Nakashima
2012 July 23.6221615.4CYouichirou Nakashima
2012 July 23.6235215.6CYouichirou Nakashima
2012 July 31.5330315.2CYouichirou Nakashima
2012 July 31.5343915.5CYouichirou Nakashima
2012 July 31.5357415.3CYouichirou Nakashima
2012 Aug. 19.7035915.7CYouichirou Nakashima
2012 Sept. 24.6216415.4CYouichirou Nakashima
2012 Sept. 24.6230015.7CYouichirou Nakashima
2012 Sept. 25.4959115.0CYouichirou Nakashima
2012 Sept. 25.4972715.1CYouichirou Nakashima
2012 Oct. 7.5416915.6CYouichirou Nakashima
2012 Oct. 7.5430415.7CYouichirou Nakashima
2012 Oct. 7.5444115.3CYouichirou Nakashima
2012 Oct. 19.5403615.3CYouichirou Nakashima
2012 Oct. 19.5417115.6CYouichirou Nakashima
2012 Oct. 19.5430815.3CYouichirou Nakashima
2012 Dec. 31.3981315.4CYouichirou Nakashima
2012 Dec. 31.3994815.7CYouichirou Nakashima
2012 Dec. 31.4008415.8CYouichirou Nakashima
2013 July 7.6561815.4CYouichirou Nakashima
2013 July 7.6575315.2CYouichirou Nakashima
2013 July 7.6589015.6CYouichirou Nakashima
2013 July 7.6602515.3CYouichirou Nakashima
2013 Aug. 12.6394115.7CYouichirou Nakashima
2013 Aug. 12.6407615.9CYouichirou Nakashima
2013 Sept. 16.6092015.8CYouichirou Nakashima
2013 Sept. 16.6105716.0CYouichirou Nakashima
2013 Sept. 18.5651915.8CYouichirou Nakashima
2013 Sept. 18.5665415.8CYouichirou Nakashima
2013 Sept. 18.5678915.7CYouichirou Nakashima

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