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[vsnet-obs 20244] New Takamizawa variable (TmzV345)

New Takamizawa variable (TmzV345)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV345).

TmzV345
= USNO0600.03287799 072005.352 -260229.33 (2000.0) 13.4 16.5
= IRAS07180-2556 071801.8 -255650 (1950.0)
    F12=0.58  F25=0.30  F60=0.40L F100=6.31L
    VAR=18 LRS=-1
 possibly IIIa: variable star with more evolved O-rich c.s. shell
 or VIb: variable star with relatively hot dust close to
      the star and relatively cold dust at large distance
      may be O-rich
 or VII: variable star with more evolved C-rich circumstellar shell
= 072004.8 -260228 (2000.0) IRAS07180-2556 0.572 0.287 0.400L 6.367L 18%
= 072004.8 -260228 (2000.0) SSC07180-2556 0.572 0.287 0.400L 6.367L
= 072006.0 -260059 (2000.0) M8(III)(Buscombe) - - -

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 14.5-15.2p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV345        940314.501  145p  Tmz.VSOLJ
TmzV345        941111.731  151p  Tmz.VSOLJ
TmzV345        950203.546  147p  Tmz.VSOLJ
TmzV345        950927.799  147p  Tmz.VSOLJ
TmzV345        951118.744  146p  Tmz.VSOLJ
TmzV345        951222.685  151p  Tmz.VSOLJ
TmzV345        961021.768  150p  Tmz.VSOLJ
TmzV345        961206.707  152p  Tmz.VSOLJ
TmzV345        970103.622  147p  Tmz.VSOLJ
TmzV345        970227.485  152p  Tmz.VSOLJ
TmzV345        971013.798  146p  Tmz.VSOLJ
TmzV345        971103.802  145p  Tmz.VSOLJ
TmzV345        971204.695  150p  Tmz.VSOLJ
TmzV345        971224.633  152p  Tmz.VSOLJ
TmzV345        980121.549  148p  Tmz.VSOLJ
TmzV345        980217.497  151p  Tmz.VSOLJ
TmzV345        980325.453  150p  Tmz.VSOLJ
TmzV345        981115.737  146p  Tmz.VSOLJ
TmzV345        981212.628  147p  Tmz.VSOLJ
TmzV345        990208.557  146p  Tmz.VSOLJ
TmzV345        990404.438  151p  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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