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[vsnet-newvar 1125] New Takamizawa variable (TmzV817)

New Takamizawa variable (TmzV817)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV817).

TmzV817
= GSC5181.642 204222.52 -025442.3 (2000.0) 12.66 0
= GSC5181.642 204222.53 -025442.3 (2000.0) 11.82 0
= USNO0825.18690066 204222.548 -025441.96 (2000.0)  9.6 11.8
= 2MASS 204222.536 -025442.48 (2000.0)  0.000  0.000  0.000
= IRAS20397-0305 203945.9 -030532 (1950.0)
     F12=2.51  F25=1.10  F60=0.40L F100=1.00L
     VAR=14 LRS=-1
  possibly II: variable star with 'young' O-rich circumstellar shell
  or VII: variable star with more evolved C-rich circumstellar shell
= 204221.9 -025443 (2000.0) FSC20397-0305 2.395 1.026 0.236 0.513L
= 204222.2 -025444 (2000.0) IRAS20397-0305 2.467 1.066 0.400L 1.000L 14%
= 204222.2 -025444 (2000.0) SSC20397-0305 2.467 1.066 0.400L 1.000L
= 204222.5 -025442 (2000.0) 1084 1.16 TYC5181.642.1 plx=-330.6(53.5) (0.10 0.25)
= 204222.5 -025441 (2000.0) 1070 1.26 TYC2-5181.642.1 (10.83 0.06) (12.31 0.16)

  Takamizawa's comment:

  The star may be a semiregular variable  with a range of 10.6-11.3p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV817        19940413.778  108p  Tmz.VSOLJ
TmzV817        19940703.654  109p  Tmz.VSOLJ
TmzV817        19940803.576  113p  Tmz.VSOLJ
TmzV817        19940810.663  109p  Tmz.VSOLJ
TmzV817        19940930.528  110p  Tmz.VSOLJ
TmzV817        19941102.444  108p  Tmz.VSOLJ
TmzV817        19941127.412  110p  Tmz.VSOLJ
TmzV817        19950306.828  109p  Tmz.VSOLJ
TmzV817        19950311.834  111p  Tmz.VSOLJ
TmzV817        19950401.788  106p  Tmz.VSOLJ
TmzV817        19950723.647  110p  Tmz.VSOLJ
TmzV817        19951014.506  113p  Tmz.VSOLJ
TmzV817        19960815.567  109p  Tmz.VSOLJ
TmzV817        19961030.456  107p  Tmz.VSOLJ
TmzV817        19970309.826  108p  Tmz.VSOLJ
TmzV817        19970706.678  111p  Tmz.VSOLJ
TmzV817        19970901.582  109p  Tmz.VSOLJ
TmzV817        19971025.526  111p  Tmz.VSOLJ
TmzV817        19990708.663  107p  Tmz.VSOLJ
TmzV817        20000314.817  108p  Tmz.VSOLJ
TmzV817        20011013.451  110p  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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