Home Page Updated on December 16, 2020
MisV1441
|
| R.A. | 20h50m50s.42 | |
| Decl. | +44o50'11".7 | (2000.0) |
| Mag. | 14.66-17.65R | |
| Type | INSB? |
= 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)
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
| Date | Mag | Filter | Observer |
|---|---|---|---|
| 2001 July 19.63330 | 15.6 | C | Nobuo Ohkura |
| 2001 July 19.63515 | 15.5 | C | Nobuo Ohkura |
| 2001 Oct. 14.42109 | 15.5 | C | Nobuo Ohkura |
| 2001 Oct. 14.42306 | 15.3 | C | Nobuo Ohkura |
| 2007 Aug. 24.60441 | 15.8 | C | Youichirou Nakashima |
| 2007 Sept. 7.56012 | 15.7 | C | Youichirou Nakashima |
| 2007 Sept. 19.51979 | 15.9 | C | Youichirou Nakashima |
| 2007 Sept. 19.52185 | 15.7 | C | Youichirou Nakashima |
| 2007 Sept. 25.58978 | 15.8 | C | Youichirou Nakashima |
| 2007 Oct. 5.53148 | 15.4 | C | Youichirou Nakashima |
| 2007 Oct. 5.53354 | 15.5 | C | Youichirou Nakashima |
| 2008 May 20.62890 | 14.4 | C | Youichirou Nakashima |
| 2008 May 20.63094 | 14.7 | C | Youichirou Nakashima |
| 2008 July 3.60596 | 14.6 | C | Youichirou Nakashima |
| 2008 July 3.60800 | 14.5 | C | Youichirou Nakashima |
| 2008 July 3.61003 | 14.5 | C | Youichirou Nakashima |
| 2008 July 31.69681 | 15.0 | C | Youichirou Nakashima |
| 2008 July 31.69884 | 15.0 | C | Youichirou Nakashima |
| 2008 Sept. 8.54822 | 15.0 | C | Youichirou Nakashima |
| 2008 Sept. 8.55024 | 15.1 | C | Youichirou Nakashima |
| 2008 Sept. 8.55227 | 15.1 | C | Youichirou Nakashima |
| 2010 Sept. 16.55938 | [15.6 | C | Youichirou Nakashima |
| 2010 Nov. 17.42639 | [16.7 | C | Youichirou Nakashima |
| 2010 Nov. 17.42773 | [16.6 | C | Youichirou Nakashima |
| 2010 Nov. 17.42906 | [16.1 | C | Youichirou Nakashima |
| 2011 Sept. 10.53315 | 15.5 | C | Youichirou Nakashima |
| 2011 Sept. 10.53449 | 15.6 | C | Youichirou Nakashima |
| 2011 Sept. 23.54782 | 15.3 | C | Youichirou Nakashima |
| 2011 Sept. 23.54917 | 15.3 | C | Youichirou Nakashima |
| 2011 Sept. 23.55051 | 15.4 | C | Youichirou Nakashima |
| 2011 Oct. 18.46877 | 14.6 | C | Youichirou Nakashima |
| 2011 Oct. 18.47012 | 14.6 | C | Youichirou Nakashima |
| 2011 Oct. 18.47145 | 14.6 | C | Youichirou Nakashima |
| 2011 Nov. 16.400 | 14.84 | C | Hidehiko Akazawa |
| 2011 Dec. 16.40346 | 16.2 | C | Youichirou Nakashima |
| 2012 June 3.61793 | [15.0 | C | Youichirou Nakashima |
| 2012 June 3.61928 | [15.0 | C | Youichirou Nakashima |
| 2012 June 3.62065 | [15.0 | C | Youichirou Nakashima |
| 2012 June 3.62200 | [15.0 | C | Youichirou Nakashima |
| 2012 June 13.58206 | [15.5 | C | Youichirou Nakashima |
| 2012 June 13.58341 | [15.5 | C | Youichirou Nakashima |
| 2012 June 13.58478 | [15.5 | C | Youichirou Nakashima |
| 2012 June 13.58613 | [15.5 | C | Youichirou Nakashima |
| 2012 June 13.58749 | [15.5 | C | Youichirou Nakashima |
| 2012 July 23.62216 | 15.4 | C | Youichirou Nakashima |
| 2012 July 23.62352 | 15.6 | C | Youichirou Nakashima |
| 2012 July 31.53303 | 15.2 | C | Youichirou Nakashima |
| 2012 July 31.53439 | 15.5 | C | Youichirou Nakashima |
| 2012 July 31.53574 | 15.3 | C | Youichirou Nakashima |
| 2012 Aug. 19.70359 | 15.7 | C | Youichirou Nakashima |
| 2012 Sept. 24.62164 | 15.4 | C | Youichirou Nakashima |
| 2012 Sept. 24.62300 | 15.7 | C | Youichirou Nakashima |
| 2012 Sept. 25.49591 | 15.0 | C | Youichirou Nakashima |
| 2012 Sept. 25.49727 | 15.1 | C | Youichirou Nakashima |
| 2012 Oct. 7.54169 | 15.6 | C | Youichirou Nakashima |
| 2012 Oct. 7.54304 | 15.7 | C | Youichirou Nakashima |
| 2012 Oct. 7.54441 | 15.3 | C | Youichirou Nakashima |
| 2012 Oct. 19.54036 | 15.3 | C | Youichirou Nakashima |
| 2012 Oct. 19.54171 | 15.6 | C | Youichirou Nakashima |
| 2012 Oct. 19.54308 | 15.3 | C | Youichirou Nakashima |
| 2012 Dec. 31.39813 | 15.4 | C | Youichirou Nakashima |
| 2012 Dec. 31.39948 | 15.7 | C | Youichirou Nakashima |
| 2012 Dec. 31.40084 | 15.8 | C | Youichirou Nakashima |
| 2013 July 7.65618 | 15.4 | C | Youichirou Nakashima |
| 2013 July 7.65753 | 15.2 | C | Youichirou Nakashima |
| 2013 July 7.65890 | 15.6 | C | Youichirou Nakashima |
| 2013 July 7.66025 | 15.3 | C | Youichirou Nakashima |
| 2013 Aug. 12.63941 | 15.7 | C | Youichirou Nakashima |
| 2013 Aug. 12.64076 | 15.9 | C | Youichirou Nakashima |
| 2013 Sept. 16.60920 | 15.8 | C | Youichirou Nakashima |
| 2013 Sept. 16.61057 | 16.0 | C | Youichirou Nakashima |
| 2013 Sept. 18.56519 | 15.8 | C | Youichirou Nakashima |
| 2013 Sept. 18.56654 | 15.8 | C | Youichirou Nakashima |
| 2013 Sept. 18.56789 | 15.7 | C | Youichirou Nakashima |