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[vsnet-obs 20150] New Takamizawa variable (TmzV331)

New Takamizawa variable (TmzV331)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV331).

TmzV331
= GSC3869.571 153119.69 +524433.6 (2000.0) 10.93 1
= USNO1425.08423709 153119.684 +524433.52 (2000.0) 11.0 13.9
= IRAS15299+5254 152956.0 +525442 (1950.0)
    F12=0.58  F25=0.28  F60=0.40L F100=1.00L
    VAR=92 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
= 153119.3 +524434 (2000.0) FSC15299+5254 0.579 0.214 0.130L 0.370L
= 153119.6 +524434 (2000.0) IRAS15299+5254 0.602 0.282 0.400L 1.000L 92%
= 153119.6 +524434 (2000.0) SSC15299+5254 0.602 0.282 0.400L 1.000L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 10.9-11.9p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV331        950423.577  109p  Tmz.VSOLJ
TmzV331        970704.567  116p  Tmz.VSOLJ
TmzV331        980105.798  113p  Tmz.VSOLJ
TmzV331        980402.699  119p  Tmz.VSOLJ
TmzV331        980419.597  116p  Tmz.VSOLJ
TmzV331        980912.451  117p  Tmz.VSOLJ
TmzV331        980913.480  114p  Tmz.VSOLJ
TmzV331        981010.422  114p  Tmz.VSOLJ
TmzV331        990117.834  117p  Tmz.VSOLJ
TmzV331        990316.703  115p  Tmz.VSOLJ
TmzV331        990413.665  113p  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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