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[vsnet-newvar 1115] New Takamizawa variable (TmzV809)

New Takamizawa variable (TmzV809)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV809).

TmzV809
= GSC5760.963 204254.35 -101107.1 (2000.0) 11.23 0
= USNO0750.20407586 204254.350 -101107.16 (2000.0) 11.2 99.9
= IRAS20401-1021 204011.2 -102157 (1950.0)
     F12=3.02  F25=0.76  F60=0.40L F100=1.00L
     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
= 204254.8 -101113 (2000.0) SD-10.5480 9.5
= 204254.1 -101107 (2000.0) IRAS20401-1021 3.018 0.764 0.400L 1.000L 0%
= 204254.1 -101107 (2000.0) SSC20401-1021 3.018 0.764 0.400L 1.000L
= 204254.7 -101105 (2000.0) FSC20401-1021 2.912 0.704 0.257L 0.699L
= 204254.3 -101107 (2000.0) 1026 1.25 TYC5760.963.1 plx=68.0(42.9) (0.06 0.15)
= 204254.3 -101107 (2000.0) 1031 1.17 TYC2-5760.963.1 (10.44 0.05) (11.81 0.09)

  Takamizawa's comment:

  The star may be a semiregular variable  with a range of 10.0-10.8p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV809        19940413.785  103p  Tmz.VSOLJ
TmzV809        19940512.748  105p  Tmz.VSOLJ
TmzV809        19940703.658  104p  Tmz.VSOLJ
TmzV809        19940803.581  103p  Tmz.VSOLJ
TmzV809        19940810.659  104p  Tmz.VSOLJ
TmzV809        19940930.532  107p  Tmz.VSOLJ
TmzV809        19941127.402  108p  Tmz.VSOLJ
TmzV809        19950311.825  104p  Tmz.VSOLJ
TmzV809        19950723.655  105p  Tmz.VSOLJ
TmzV809        19951020.441  103p  Tmz.VSOLJ
TmzV809        19960423.791  100p  Tmz.VSOLJ
TmzV809        19960815.567  106p  Tmz.VSOLJ
TmzV809        19961030.456  105p  Tmz.VSOLJ
TmzV809        19970706.678  105p  Tmz.VSOLJ
TmzV809        19971025.526  106p  Tmz.VSOLJ
TmzV809        19990708.663  105p  Tmz.VSOLJ
TmzV809        20011013.451  107p  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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