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[vsnet-obs 23376] New Takamizawa variable (TmzV541)

New Takamizawa variable (TmzV541)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV541).

TmzV541
= GSC4466.2306 215458.92 +693033.6 (2000.0) 11.54 1
= GSC4466.2306 215458.97 +693034.2 (2000.0) 11.43 1
= USNO1575.04907805 215458.954 +693033.97 (2000.0) 11.0 15.8
= IRAS21539+6916 215358.1 +691619 (1950.0)
    F12=1.20  F25=0.36  F60=0.40L F100=3.02L
    VAR=84 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
= 215458.3 +693024 (2000.0) FSC21539+6916 1.122 0.325 0.376L 5.095L
= 215458.6 +693035 (2000.0) CS5507 - 13.4 - -
= 215459.2 +693034 (2000.0) IRAS21539+6916 1.185 0.355 0.400L 3.069L 84%
= 215459.2 +693034 (2000.0) SSC21539+6916 1.185 0.355 0.400L 3.069L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 11.7-12.2p.

object         YYMMDD(UT)   mag  code
TmzV541        970827.540  117p  Tmz.VSOLJ
TmzV541        971218.437  120p  Tmz.VSOLJ
TmzV541        980823.563  121p  Tmz.VSOLJ
TmzV541        980916.530  118p  Tmz.VSOLJ
TmzV541        981107.440  122p  Tmz.VSOLJ
TmzV541        990709.574  118p  Tmz.VSOLJ
TmzV541        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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