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[vsnet-newvar 1316] New Takamizawa variable (TmzV922)

New Takamizawa variable (TmzV922)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV922).

TmzV922
= GSC4297.598 012918.00 +680009.0 (2000.0) 10.94 1
= GSC4297.598 012918.07 +680008.7 (2000.0) 11.03 1
= USNO1575.00932948 012918.040 +680008.78 (2000.0) 11.5 14.4 *
= IRAS01257+6744 012542.6 +674437 (1950.0)
     F12=0.91  F25=0.25  F60=0.40L F100=2.29L
     VAR= 0 LRS=-1
  possibly I: oxygen-rich non-variable star without circumstellar shell
  or VIa: non-variable star with relatively cold dust at large
       distance, may be carbon-rich
= 012917.4 +680006 (2000.0) IRAS01257+6744 0.892 0.253 0.400L 2.297L 0%
= 012917.4 +680006 (2000.0) SSC01257+6744 0.892 0.253 0.400L 2.297L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 11.1-11.8p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV922        19950127.432  118p  Tmz.VSOLJ
TmzV922        19960922.656  116p  Tmz.VSOLJ
TmzV922        19970613.737  114p  Tmz.VSOLJ
TmzV922        19980116.420  117p  Tmz.VSOLJ
TmzV922        19980629.693  118p  Tmz.VSOLJ
TmzV922        19991128.440  117p  Tmz.VSOLJ
TmzV922        20000902.687  115p  Tmz.VSOLJ
TmzV922        20011023.613  111p  Tmz.VSOLJ

Observer's code:
  Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
       SASS (Saku All Sky Survey)
       Inst.: 10cmR F4 twin patrol cameras and 25cm F2.8
       Baker-Schmidt camera T-Max400 120
       Comparison stars mag.:GSC

Relayed from Kesao Takamizawa <k-takamizawa@nifty.ne.jp>

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