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[vsnet-obs 23428] New Takamizawa variable (TmzV561)

New Takamizawa variable (TmzV561)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV561).

TmzV561
= GSC4277.186 224608.62 +670256.0 (2000.0) 13.14 1
= USNO1500.09391074 224608.568 +670255.85 (2000.0) 12.6 16.5
= IRAS22444+6647 224425.4 +664709 (1950.0)
    F12=0.58  F25=0.19  F60=0.44L F100=4.36L
    VAR=58 LRS=-1
 possibly I: oxygen-rich non-variable star without 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
= 224608.8 +670258 (2000.0) IRAS22444+6647 0.563 0.187 0.445L 4.571L 58%
= 224608.8 +670258 (2000.0) SSC22444+6647 0.563 0.187 0.445L 4.571L
= 224555.8 +670435 (2000.0) DO41960

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 13.0-13.7p.

object         YYMMDD(UT)   mag  code
TmzV561        970827.540  135p  Tmz.VSOLJ
TmzV561        971218.437  132p  Tmz.VSOLJ
TmzV561        980823.563  133p  Tmz.VSOLJ
TmzV561        980916.530  130p  Tmz.VSOLJ
TmzV561        981107.440  136p  Tmz.VSOLJ
TmzV561        990709.574  137p  Tmz.VSOLJ
TmzV561        990807.594  131p  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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