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[vsnet-obs 23424] New Takamizawa variable (TmzV557)

New Takamizawa variable (TmzV557)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV557).

TmzV557
= GSC4476.1060 224138.94 +675957.2 (2000.0) 14.16 1 N
= USNO1575.05293798 224139.004 +675957.04 (2000.0) 13.0 18.1
= IRAS22400+6744 224000.8 +674416 (1950.0)
    F12=0.58  F25=0.21  F60=0.48L F100=4.36L
    VAR=40 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
= 224138.8 +675958 (2000.0) IRAS22400+6744 0.595 0.205 0.471L 4.432L 40%
= 224138.8 +675958 (2000.0) SSC22400+6744 0.595 0.205 0.471L 4.432L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 14.1-14.8p.

object         YYMMDD(UT)   mag  code
TmzV557        970827.540  141p  Tmz.VSOLJ
TmzV557        971218.437  144p  Tmz.VSOLJ
TmzV557        980823.563  142p  Tmz.VSOLJ
TmzV557        980916.530  143p  Tmz.VSOLJ
TmzV557        981107.440  144p  Tmz.VSOLJ
TmzV557        990709.574  146p  Tmz.VSOLJ
TmzV557        990807.594  148p  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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