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[vsnet-newvar 1121] New Takamizawa variable (TmzV813)

New Takamizawa variable (TmzV813)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV813).

TmzV813
= GSC5189.1523 204121.05 -054503.2 (2000.0) 12.95 0
= USNO0825.18670016 204121.058 -054503.54 (2000.0) 10.5 13.5
= 2MASS 204121.048 -054503.24 (2000.0)  0.000  0.000  0.000
= IRAS20387-0555 203842.3 -055547 (1950.0)
     F12=2.51  F25=0.91  F60=0.40L F100=1.00L
     VAR= 8 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
= 204120.3 -054505 (2000.0) FSC20386-0555 2.531 0.972 0.228 0.628L
= 204121.2 -054502 (2000.0) IRAS20387-0555 2.470 0.947 0.400L 1.000L 8%
= 204121.2 -054502 (2000.0) SSC20387-0555 2.470 0.947 0.400L 1.000L

  Takamizawa's comment:

  The star may be a semiregular variable  with a range of 12.2-13.1p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV813        19940413.778  126p  Tmz.VSOLJ
TmzV813        19940703.654  126p  Tmz.VSOLJ
TmzV813        19940803.576  126p  Tmz.VSOLJ
TmzV813        19940810.663  126p  Tmz.VSOLJ
TmzV813        19940930.528  128p  Tmz.VSOLJ
TmzV813        19941102.444  127p  Tmz.VSOLJ
TmzV813        19941127.412  127p  Tmz.VSOLJ
TmzV813        19950306.828  131p  Tmz.VSOLJ
TmzV813        19950311.834  129p  Tmz.VSOLJ
TmzV813        19950401.788  127p  Tmz.VSOLJ
TmzV813        19950723.647  128p  Tmz.VSOLJ
TmzV813        19951014.506  126p  Tmz.VSOLJ
TmzV813        19960815.567  130p  Tmz.VSOLJ
TmzV813        19961030.456  129p  Tmz.VSOLJ
TmzV813        19970309.826  127p  Tmz.VSOLJ
TmzV813        19970706.678  126p  Tmz.VSOLJ
TmzV813        19970901.582  127p  Tmz.VSOLJ
TmzV813        19971025.526  126p  Tmz.VSOLJ
TmzV813        19990708.663  130p  Tmz.VSOLJ
TmzV813        20000314.817  122p  Tmz.VSOLJ
TmzV813        20011013.451  126p  Tmz.VSOLJ

Observer's code:
  Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
       SASS (Saku All Sky Survey)
       Inst.: 10cmR F4 twin patrol cameras and 25cm F2.8
       Baker-Schmidt camera T-Max400 120
       Comparison stars mag.:GSC

Relayed from Kesao Takamizawa <k-takamizawa@nifty.ne.jp>

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