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[vsnet-obs 19929] New Takamizawa variable (TmzV306)

New Takamizawa variable (TmzV306)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV306).

TmzV306
= GSC5395.2083 071849.25 -080338.7 (2000.0) 14.38 0
= USNO0750.03921899 071849.234 -080338.92 (2000.0) 11.1 15.1
= IRAS07164-0758 071625.0 -075805 (1950.0)
    F12=0.58  F25=0.28  F60=0.40L F100=1.58L
    VAR= 0 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
= 071849.8 -080337 (2000.0) IRAS07164-0758 0.549 0.267 0.400L 1.614L 0%
= 071849.8 -080337 (2000.0) SSC07164-0758 0.549 0.267 0.400L 1.614L
= 071848.0 -080300 (2000.0) M8(III)(Buscombe) - - -

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 12.8-14.3p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV306        940314.509  136p  Tmz.VSOLJ
TmzV306        941111.738  128p  Tmz.VSOLJ
TmzV306        950203.556  132p  Tmz.VSOLJ
TmzV306        951222.676  136p  Tmz.VSOLJ
TmzV306        960211.515  135p  Tmz.VSOLJ
TmzV306        961021.776  140p  Tmz.VSOLJ
TmzV306        961206.699  131p  Tmz.VSOLJ
TmzV306        970103.614  137p  Tmz.VSOLJ
TmzV306        970227.476  138p  Tmz.VSOLJ
TmzV306        971013.791  138p  Tmz.VSOLJ
TmzV306        971103.794  137p  Tmz.VSOLJ
TmzV306        971204.703  135p  Tmz.VSOLJ
TmzV306        971224.641  140p  Tmz.VSOLJ
TmzV306        980121.556  140p  Tmz.VSOLJ
TmzV306        980325.461  141p  Tmz.VSOLJ
TmzV306        981115.744  141p  Tmz.VSOLJ
TmzV306        981212.657  143p  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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