Home Page Updated on December 16, 2020
MisV0368
|
| R.A. | 21h58m56s.65 | |
| Decl. | +55o13'36".5 | (2000.0) |
| Mag. | 12.1-13.0C | |
| Type | SR | |
| Period | 100 | |
| Epoch | 2451325 |
= USNO-A2.0_1425.12612175 21 58 56.650 +55 13 36.53 13.9R 18.7B
Digitized Sky Survey GIF image (15 x 15 arcmin)
NSVS Light Curve (NSVS 3422661)
Discovery Information
It was detected by the PIXY system as one of the candidates of new variable stars from images taken by Ken-ichi Kadota, Ageo City, Saitama, Japan, then confirmed by Seiichi Yoshida.
Special Notes
The NSVS data revealed that it is a semi regular variable with a range of 12.7 - 13.5 mag, and a period of 100 days. The unfiltered CCD observations from 1999 to 2000 by Ken-ichi Kadota and Nobuo Ohkura coincided to the magnitude range and the period.
However, it was observed as 15.4 mag, much fainter than the range, in the course of the unfiltered CCD observations by Nobuo Ohkura using a 300-mm camera lens in 2003 September. It is uncertain if the star really faded drastically, or that is an effect of came lens characteristics.
Research and Publication
-
New Variable Stars Discovered in the MISAO Project VII: MisV0351-MisV0400
IBVS 4842
Yoshida, S.; Kadota, K.; Kato, T.
-
Revision of 14 MISAO New Variables
Yoshida, S.
Light Curve
Light curve by the Northern Sky Variability Survey (NSVS) created using SkyDOT.
SkyDOT is operated by the University of California for the National Nuclear Security Administration of the US Department of Energy.
Observations by MISAO Project
| Date | Mag | Filter | Observer |
|---|---|---|---|
| 1999 May 20.77318 | 12.2 | C | Ken-ichi Kadota |
| 1999 May 20.77361 | 12.1 | C | Ken-ichi Kadota |
| 1999 July 9.69524 | 12.9 | C | Ken-ichi Kadota |
| 1999 July 9.69568 | 13.0 | C | Ken-ichi Kadota |
| 1999 Aug. 17.76182 | 12.6 | C | Ken-ichi Kadota |
| 1999 Aug. 17.76227 | 12.6 | C | Ken-ichi Kadota |
| 1999 Aug. 21.73260 | 12.7 | C | Ken-ichi Kadota |
| 1999 Aug. 21.73306 | 12.7 | C | Ken-ichi Kadota |
| 1999 Aug. 31.65363 | 12.5 | C | Ken-ichi Kadota |
| 1999 Aug. 31.65404 | 12.5 | C | Ken-ichi Kadota |
| 1999 Sept. 12.74141 | 12.3 | C | Ken-ichi Kadota |
| 1999 Sept. 12.74201 | 12.2 | C | Ken-ichi Kadota |
| 1999 Sept. 23.51293 | 12.6 | C | Ken-ichi Kadota |
| 1999 Sept. 23.51337 | 12.6 | C | Ken-ichi Kadota |
| 2000 Aug. 29.51094 | 12.8 | C | Nobuo Ohkura |
| 2000 Aug. 29.51279 | 12.9 | C | Nobuo Ohkura |
| 2000 Aug. 29.51465 | 12.8 | C | Nobuo Ohkura |
| 2000 Oct. 4.49390 | 12.6 | C | Nobuo Ohkura |
| 2000 Oct. 4.49575 | 12.6 | C | Nobuo Ohkura |
| 2000 Oct. 4.49762 | 12.5 | C | Nobuo Ohkura |
| 2000 Oct. 4.49947 | 12.6 | C | Nobuo Ohkura |
| 2000 Oct. 30.43493 | 12.4 | C | Nobuo Ohkura |
| 2003 Sept. 14.53586 | 15.5 | C | Nobuo Ohkura |
| 2003 Sept. 14.53981 | 15.5 | C | Nobuo Ohkura |
| 2003 Sept. 16.52737 | 15.5 | C | Nobuo Ohkura |
| 2003 Sept. 16.53131 | 15.4 | C | Nobuo Ohkura |
| 2003 Sept. 26.50325 | 15.6 | C | Nobuo Ohkura |
| 2003 Sept. 27.48863 | 15.2 | C | Nobuo Ohkura |
| 2003 Sept. 27.49060 | 15.0 | C | Nobuo Ohkura |
| 2003 Sept. 27.49257 | 15.2 | C | Nobuo Ohkura |
| 2003 Sept. 30.47050 | 15.5 | C | Nobuo Ohkura |
| 2003 Sept. 30.47247 | 15.4 | C | Nobuo Ohkura |
| 2003 Sept. 30.47443 | 15.1 | C | Nobuo Ohkura |
| 2011 Sept. 8.53181 | 14.7 | Rc | Tsutomu Fujiwara |
| 2011 Sept. 24.55640 | 14.5 | Rc | Tsutomu Fujiwara |
| 2011 Oct. 7.53133 | 14.6 | Rc | Tsutomu Fujiwara |
| 2011 Oct. 16.54201 | 14.8 | Rc | Tsutomu Fujiwara |
| 2011 Oct. 23.55992 | 14.3 | Rc | Tsutomu Fujiwara |
| 2011 Nov. 8.53416 | 13.8 | Rc | Tsutomu Fujiwara |
| 2011 Nov. 16.51545 | 13.7 | Rc | Tsutomu Fujiwara |
| 2011 Nov. 26.54310 | 13.7 | Rc | Tsutomu Fujiwara |
| 2011 Dec. 17.53215 | 14.5 | Rc | Tsutomu Fujiwara |
| 2012 Jan. 4.48203 | 15.1 | Rc | Tsutomu Fujiwara |