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[vsnet-obs 18749] New Takamizawa variable (TmzV139)

New Takamizawa variable (TmzV139)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV139).

TmzV139
= GSC2909.681 052044.97 +381050.1 (2000.0) 12.48 1
= USNO1275.04778408 052044.930 +381050.24 (2000.0) 13.4 15.1
= IRAS05173+3807 051719.5 +380752 (1950.0)
    F12=1.90  F25=1.20  F60=0.40L F100=8.31L
    VAR=89 LRS=-1
 possibly IIIa: variable star with more evolved O-rich c.s. shell
 or VII: variable star with more evolved C-rich circumstellar shell
= 052044.8 +381050 (2000.0) IRAS05173+3807 1.886 1.151 0.400L 7.974L 89%
= 052044.8 +381050 (2000.0) SSC05173+3807 1.886 1.151 0.400L 7.974L

  Takamizawa's comment:

  The star may be a semiregular variable (SR) with a range of 12.0-14.1p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV139        940302.540  138p  Tmz.VSOLJ
TmzV139        940810.775  138p  Tmz.VSOLJ
TmzV139        941108.597  137p  Tmz.VSOLJ
TmzV139        941224.488  139p  Tmz.VSOLJ
TmzV139        950320.515  121p  Tmz.VSOLJ
TmzV139        950823.769  139p  Tmz.VSOLJ
TmzV139        951128.608  138p  Tmz.VSOLJ
TmzV139        960109.422  140p  Tmz.VSOLJ
TmzV139        960922.747  139p  Tmz.VSOLJ
TmzV139        961015.731  139p  Tmz.VSOLJ
TmzV139        961203.547  137p  Tmz.VSOLJ
TmzV139        970802.749  141p  Tmz.VSOLJ
TmzV139        971123.615  127p  Tmz.VSOLJ
TmzV139        980318.465  136p  Tmz.VSOLJ
TmzV139        980820.731  138p  Tmz.VSOLJ
TmzV139        981024.609  120p  Tmz.VSOLJ
TmzV139        981218.596  127p  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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