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[vsnet-obs 19795] New Takamizawa variable (TmzV290)

New Takamizawa variable (TmzV290)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV290).

TmzV290
= GSC183.2025 073947.72 +031241.6 (2000.0) 11.59 6
= USNO0900.05288991 073947.710 +031241.57 (2000.0) 11.2 14.1
= IRAS07371+0319 073710.4 +031940 (1950.0)
    F12=0.69  F25=0.40  F60=0.40L F100=1.00L
    VAR=39 LRS=-1
 possibly IIIa: variable star with more evolved O-rich c.s. shell
 or VIb: variable star with relatively hot dust close to
      the star and relatively cold dust at large distance
      may be O-rich
 or VII: variable star with more evolved C-rich circumstellar shell
= 073947.5 +031242 (2000.0) IRAS07371+0319 0.693 0.393 0.400L 1.000L 39%
= 073947.5 +031242 (2000.0) SSC07371+0319 0.693 0.393 0.400L 1.000L
= 073948.8 +031237 (2000.0) FSC07371+0319 0.655 0.340 0.143L 1.087L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 11.5-12.3p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV290        940306.451  117p  Tmz.VSOLJ
TmzV290        941111.747  118p  Tmz.VSOLJ
TmzV290        950220.486  121p  Tmz.VSOLJ
TmzV290        951025.748  123p  Tmz.VSOLJ
TmzV290        951219.605  122p  Tmz.VSOLJ
TmzV290        961021.785  121p  Tmz.VSOLJ
TmzV290        961206.691  120p  Tmz.VSOLJ
TmzV290        971103.787  117p  Tmz.VSOLJ
TmzV290        971204.711  118p  Tmz.VSOLJ
TmzV290        971224.649  118p  Tmz.VSOLJ
TmzV290        980121.564  115p  Tmz.VSOLJ
TmzV290        980217.513  119p  Tmz.VSOLJ
TmzV290        980325.469  119p  Tmz.VSOLJ
TmzV290        980919.769  115p  Tmz.VSOLJ
TmzV290        981115.752  115p  Tmz.VSOLJ
TmzV290        981212.644  116p  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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