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[vsnet-newvar 643] New Takamizawa variable (TmzV756)

New Takamizawa variable (TmzV756)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV756).

TmzV756
= GSC4903.436 100145.56 -021316.6 (2000.0) 13.20 0
= GSC4903.436 100145.59 -021317.3 (2000.0) 12.88 0
= USNO0825.07097306 100145.578 -021317.54 (2000.0) 11.4 15.3
= 2MASS 100145.619 -021316.66 (2000.0)  6.173  0.000  4.897
= IRAS09592-0158 095913.4 -015849 (1950.0)
     F12=1.32  F25=0.76  F60=0.40L F100=1.00L
     VAR=57 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
= 100145.0 -021313 (2000.0) FSC09592-0158 1.340 0.702 0.241L 0.779L
= 100145.8 -021317 (2000.0) IRAS09592-0158 1.377 0.752 0.400L 1.000L 57%
= 100145.8 -021317 (2000.0) SSC09592-0158 1.377 0.752 0.400L 1.000L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 12.1-13.4p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV756        19940217.633  134p  Tmz.VSOLJ
TmzV756        19940306.543  131p  Tmz.VSOLJ
TmzV756        19940402.531  123p  Tmz.VSOLJ
TmzV756        19940428.512  129p  Tmz.VSOLJ
TmzV756        19941103.758  129p  Tmz.VSOLJ
TmzV756        19941129.725  124p  Tmz.VSOLJ
TmzV756        19950222.529  129p  Tmz.VSOLJ
TmzV756        19951022.795  131p  Tmz.VSOLJ
TmzV756        19951101.760  124p  Tmz.VSOLJ
TmzV756        19960211.557  121p  Tmz.VSOLJ
TmzV756        19970330.469  122p  Tmz.VSOLJ
TmzV756        19971029.783  132p  Tmz.VSOLJ
TmzV756        19980102.721  129p  Tmz.VSOLJ
TmzV756        19981126.774  132p  Tmz.VSOLJ
TmzV756        19991203.778  131p  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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