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[vsnet-obs 20002] New Takamizawa variable (TmzV315)

New Takamizawa variable (TmzV315)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV315).

TmzV315
= USNO0675.04419040 073426.779 -160333.20 (2000.0) 11.2 19.7
= IRAS07321-1556 073209.9 -155654 (1950.0)
    F12=0.91  F25=0.30  F60=0.40L F100=1.44L
    VAR=42 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
= 073425.9 -160330 (2000.0) IRAS07321-1556 0.932 0.301 0.400L 1.442L 42%
= 073425.9 -160330 (2000.0) SSC07321-1556 0.932 0.301 0.400L 1.442L
= 073426.5 -160331 (2000.0) CS1778 - 14.2 11.2 -
= 073423.9 -160300 (2000.0) C(Buscombe) V=14.2 - -

  Takamizawa's comment:

  The star may be an irregular variable with a range of 13.6-14.4p.
The star is visible at mag ~17.5 on Real-Sky CD.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV315        940314.505  141p  Tmz.VSOLJ
TmzV315        941111.738  141p  Tmz.VSOLJ
TmzV315        950203.546  140p  Tmz.VSOLJ
TmzV315        950927.799  140p  Tmz.VSOLJ
TmzV315        951118.744  139p  Tmz.VSOLJ
TmzV315        951222.685  141p  Tmz.VSOLJ
TmzV315        960211.515  141p  Tmz.VSOLJ
TmzV315        961021.776  139p  Tmz.VSOLJ
TmzV315        961206.707  142p  Tmz.VSOLJ
TmzV315        970103.622  144p  Tmz.VSOLJ
TmzV315        970227.485  142p  Tmz.VSOLJ
TmzV315        971013.791  139p  Tmz.VSOLJ
TmzV315        971103.802  142p  Tmz.VSOLJ
TmzV315        971204.703  142p  Tmz.VSOLJ
TmzV315        971224.641  142p  Tmz.VSOLJ
TmzV315        980121.556  136p  Tmz.VSOLJ
TmzV315        980217.505  140p  Tmz.VSOLJ
TmzV315        980325.461  138p  Tmz.VSOLJ
TmzV315        981115.744  138p  Tmz.VSOLJ
TmzV315        981212.628  138p  Tmz.VSOLJ
TmzV315        990208.557  140p  Tmz.VSOLJ
TmzV315        990404.438  140p  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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