[vsnet-newvar 644] New Takamizawa variable (TmzV757)

[Taichi Kato <tkato>]

New Takamizawa variable (TmzV757)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV757).

TmzV757
= GSC4903.512 100241.24 -013337.8 (2000.0) 12.28 0
= USNO0825.07101904 100241.241 -013337.73 (2000.0)  9.6 13.2
= 2MASS 100241.256 -013337.80 (2000.0)  0.000  0.000  0.000
= 2MASS 100241.287 -013337.57 (2000.0)  5.543  0.000  0.000
= IRAS10001-0119 100008.3 -011908 (1950.0)
     F12=1.74  F25=0.83  F60=0.40L F100=1.00L
     VAR=80 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
= 100240.9 -013336 (2000.0) ASAS_J100241-0133.6 7.56I (0.24) 
= 100240.6 -013334 (2000.0) FSC10001-0119 1.533 0.744 0.182 0.948L
= 100241.1 -013338 (2000.0) IRAS10001-0119 1.656 0.805 0.400L 1.000L 80%
= 100241.1 -013338 (2000.0) SSC10001-0119 1.656 0.805 0.400L 1.000L
= 100241.2 -013337 (2000.0) 1100 1.73 TYC2-4903.512.1 (11.19 0.12) (13.22 0.46)
= 100241.8 -013156 (2000.0) DO2876
= 100242.0 -013059 (2000.0) M3(III)(Buscombe) - - -
= 100242.0 -013059 (2000.0) M5(III)(Buscombe) - - -

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 10.7-12.2p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV757        19940217.633  118p  Tmz.VSOLJ
TmzV757        19940306.543  121p  Tmz.VSOLJ
TmzV757        19940402.531  122p  Tmz.VSOLJ
TmzV757        19940428.512  118p  Tmz.VSOLJ
TmzV757        19941103.758  118p  Tmz.VSOLJ
TmzV757        19941129.725  113p  Tmz.VSOLJ
TmzV757        19950222.529  108p  Tmz.VSOLJ
TmzV757        19951022.795  116p  Tmz.VSOLJ
TmzV757        19951101.760  120p  Tmz.VSOLJ
TmzV757        19960211.557  107p  Tmz.VSOLJ
TmzV757        19970330.469  112p  Tmz.VSOLJ
TmzV757        19971029.783  116p  Tmz.VSOLJ
TmzV757        19980102.721  118p  Tmz.VSOLJ
TmzV757        19981126.774  122p  Tmz.VSOLJ
TmzV757        19991203.778  120p  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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