Home Page Updated on December 16, 2020
MisV0001
|
| R.A. | 17h52m26s.59 | |
| Decl. | -17o40'00".7 | (2000.0) |
| Mag. | 13.9-16.9C | |
| Type | M | |
| Period | 390: | |
| Epoch | 2451280: |
Digitized Sky Survey GIF image (15 x 15 arcmin)
Discovery Information
This is a variable star automatically discovered by the PIXY system from the 0.18-m reflector images of V4334 Sgr (Sakurai's object, cf. IAUC 6718) taken on Mar. 22 by Ken-ichi Kadota, Ageo City, Saitama, Japan. It is only 110 arcsec from V4334 Sgr.
The PIXY system compared them with the 0.18-m reflector images of V4334 Sgr taken on Feb. 12 by Ken-ichi. It found that a 15.0-mag object on Mar. 22 images was not detected from Feb. 12 images (because it was fainter than 16.4 mag). Therefore, the system output this star as a new object. But actually, it was also found on the Feb. 12 images as 16.9 mag.
No bright star is at this position on the DSS2 image. Taichi Kato, Kyoto University, reported there was only a faint object, fainter than 16 mag (V mag), at this position on the images taken in 1996 March at Ouda Observatory.
Further observations by Ken-ichi on Mar. 31 show that this star brightened about 1 mag since Mar. 22. It is still brightening.
Special Notes
Discovered from the observations of V4334 Sgr (Sakurai's object).
Seiichiro Kiyota reported Rc-band CCD observations. The light curve suggests that MisV0001 is a Mira type variable star with a period of about 390 days. One of the peak was around 2451280 (JD).
Taichi Kato reported that MisV0001 was about 16 mag on V-band image taken by Kyoto University Ouda team in 1996 March. Masayuki Suzuki also reported that MisV0001 is found on the Real Sky image taken on May 3, 1987, as a very faint star.
Research and Publication
-
New Variable Stars Discovered in the MISAO Project I: MisV0001-MisV0100
IBVS 4746
Yoshida, S.; Kadota, K.
Light Curve
Observations by MISAO Project
| Date | Mag | Filter | Observer |
|---|---|---|---|
| 1999 Feb. 12.83565 | 16.9 | C | Ken-ichi Kadota |
| 1999 Feb. 12.83852 | 16.9 | C | Ken-ichi Kadota |
| 1999 Mar. 22.79385 | 14.9 | C | Ken-ichi Kadota |
| 1999 Mar. 22.79594 | 15.1 | C | Ken-ichi Kadota |
| 1999 Mar. 31.75648 | 14.1 | C | Ken-ichi Kadota |
| 1999 Mar. 31.76264 | 14.1 | C | Ken-ichi Kadota |
| 1999 Mar. 31.76438 | 14.2 | C | Ken-ichi Kadota |
| 1999 Mar. 31.78179 | 14.9 | CIR | Ken-ichi Kadota |
| 1999 Mar. 31.78299 | 14.8 | CIR | Ken-ichi Kadota |
| 1999 Mar. 31.78541 | 14.9 | CIR | Ken-ichi Kadota |
| 1999 Mar. 31.79027 | 14.1 | R | Ken-ichi Kadota |
| 1999 Mar. 31.79293 | 14.0 | R | Ken-ichi Kadota |
| 1999 Mar. 31.79547 | 14.0 | R | Ken-ichi Kadota |