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[vsnet-obs 23375] New Takamizawa variable (TmzV540)

New Takamizawa variable (TmzV540)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV540).

TmzV540
= GSC4467.49 222108.70 +692755.8 (2000.0) 11.93 1
= GSC4467.49 222108.70 +692757.7 (2000.0) 11.41 1
= USNO1575.05130248 222108.702 +692756.75 (2000.0) 11.7 99.9
= IRAS22198+6912 221949.9 +691250 (1950.0)
    F12=0.83  F25=0.19  F60=0.40L F100=10.96L
    VAR= 6 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
= 222108.6 +692752 (2000.0) FSC22198+6912 0.799 0.202 0.511L 6.098L
= 222109.0 +692759 (2000.0) IRAS22198+6912 0.811 0.191 0.400L 11.330L 6%
= 222109.0 +692759 (2000.0) SSC22198+6912 0.811 0.191 0.400L 11.330L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 11.8-12.3p.

object         YYMMDD(UT)   mag  code
TmzV540        970827.540  122p  Tmz.VSOLJ
TmzV540        971218.437  123p  Tmz.VSOLJ
TmzV540        980823.563  121p  Tmz.VSOLJ
TmzV540        980916.530  118p  Tmz.VSOLJ
TmzV540        981107.440  123p  Tmz.VSOLJ
TmzV540        990709.574  121p  Tmz.VSOLJ
TmzV540        990807.594  118p  Tmz.VSOLJ

Observer's code:
  Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
       Inst.: 10cmR F4 twin patrol cameras  T-Max400 120
       Comparison stars mag.:GSC

Relayed from Kesao Takamizawa <GHA07243@nifty.ne.jp>

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