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[vsnet-obs 19890] New Takamizawa variable (TmzV302)

New Takamizawa variable (TmzV302)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV302).

TmzV302
= GSC5400.111 073138.12 -110138.4 (2000.0) 11.99 0
= GSC5400.111 073138.15 -110138.3 (2000.0) 12.09 0
= USNO0750.04504305 073138.149 -110138.32 (2000.0)  9.9 13.1
= IRAS07292-1055 072915.7 -105511 (1950.0)
    F12=1.74  F25=0.52  F60=0.40L F100=1.32L
    VAR=24 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
= 073136.0 -110059 (2000.0) M6(III)(Buscombe) - - -
= 073137.4 -110136 (2000.0) IRAS07292-1055 1.657 0.541 0.400L 1.264L 24%
= 073137.4 -110136 (2000.0) SSC07292-1055 1.657 0.541 0.400L 1.264L
= 073135.1 -110055 (2000.0) 1126 0.43 TYC5400.661.1 plx=-33.8(70.3) (0.14 0.20)

  Takamizawa's comment:

  The star may be an iregular variable with a range of 10.9-12.2p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV302        940314.509  119p  Tmz.VSOLJ
TmzV302        941111.738  122p  Tmz.VSOLJ
TmzV302        950203.556  115p  Tmz.VSOLJ
TmzV302        951222.676  118p  Tmz.VSOLJ
TmzV302        960211.515  118p  Tmz.VSOLJ
TmzV302        961021.776  118p  Tmz.VSOLJ
TmzV302        961206.699  119p  Tmz.VSOLJ
TmzV302        970103.614  112p  Tmz.VSOLJ
TmzV302        970227.476  120p  Tmz.VSOLJ
TmzV302        971013.791  111p  Tmz.VSOLJ
TmzV302        971103.794  118p  Tmz.VSOLJ
TmzV302        971204.703  109p  Tmz.VSOLJ
TmzV302        971224.641  119p  Tmz.VSOLJ
TmzV302        980121.556  118p  Tmz.VSOLJ
TmzV302        980325.461  121p  Tmz.VSOLJ
TmzV302        981115.744  109p  Tmz.VSOLJ
TmzV302        981212.657  117p  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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