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[vsnet-obs 19988] New Takamizawa variable (TmzV313)

New Takamizawa variable (TmzV313)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV313).

TmzV313
= USNO0675.05144302 075032.666 -180604.38 (2000.0) 12.7 16.1
= IRAS07482-1758 074817.8 -175822 (1950.0)
    F12=0.58  F25=0.28  F60=0.40L F100=1.20L
    VAR=56 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
= 075032.1 -180602 (2000.0) IRAS07482-1758 0.560 0.283 0.400L 1.227L 56%
= 075032.1 -180602 (2000.0) SSC07482-1758 0.560 0.283 0.400L 1.227L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 13.0-14.7p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV313        940314.505  146p  Tmz.VSOLJ
TmzV313        941111.738  135p  Tmz.VSOLJ
TmzV313        950203.546  142p  Tmz.VSOLJ
TmzV313        950927.799  <143p  Tmz.VSOLJ
TmzV313        951118.744  143p  Tmz.VSOLJ
TmzV313        951222.685  140p  Tmz.VSOLJ
TmzV313        960211.515  143p  Tmz.VSOLJ
TmzV313        961021.776  145p  Tmz.VSOLJ
TmzV313        961206.707  142p  Tmz.VSOLJ
TmzV313        970103.622  131p  Tmz.VSOLJ
TmzV313        970227.485  143p  Tmz.VSOLJ
TmzV313        971013.791  139p  Tmz.VSOLJ
TmzV313        971103.802  147p  Tmz.VSOLJ
TmzV313        971204.703  146p  Tmz.VSOLJ
TmzV313        971224.641  145p  Tmz.VSOLJ
TmzV313        980121.556  143p  Tmz.VSOLJ
TmzV313        980217.505  137p  Tmz.VSOLJ
TmzV313        980325.461  130p  Tmz.VSOLJ
TmzV313        981115.744  142p  Tmz.VSOLJ
TmzV313        981212.628  146p  Tmz.VSOLJ
TmzV313        990208.557  146p  Tmz.VSOLJ
TmzV313        990404.438  139p  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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