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[vsnet-obs 24069] New Takamizawa variable (TmzV590)

New Takamizawa variable (TmzV590)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV590).

TmzV590
= GSC4270.3270 215914.58 +642217.2 (2000.0) 14.26 1
= USNO1500.08709894 215914.578 +642217.35 (2000.0) 13.5 17.4
= IRAS21578+6407 215750.7 +640752 (1950.0)
    F12=0.58  F25=0.25  F60=0.52L F100=8.31L
    VAR= 0 LRS=-1
 possibly II: variable star with 'young' O-rich circumstellar shell
 or VII: variable star with more evolved C-rich circumstellar shell
 or VIa: non-variable star with relatively cold dust at large
      distance, may be carbon-rich
= 215914.3 +642216 (2000.0) IRAS21578+6407 0.571 0.240 0.517L 8.601L 0%
= 215914.3 +642216 (2000.0) SSC21578+6407 0.571 0.240 0.517L 8.601L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 13.3-14.5p.

object         YYMMDD(UT)   mag  code
TmzV590        970827.540  138p  Tmz.VSOLJ
TmzV590        971218.437  145p  Tmz.VSOLJ
TmzV590        980823.563  142p  Tmz.VSOLJ
TmzV590        980916.530  133p  Tmz.VSOLJ
TmzV590        981107.440  143p  Tmz.VSOLJ
TmzV590        990709.574  145p  Tmz.VSOLJ
TmzV590        990807.594  144p  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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