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[vsnet-newvar 676] New Takamizawa variable (TmzV779)

New Takamizawa variable (TmzV779)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV779).

TmzV779
= GSC6974.171 225753.87 -265953.9 (2000.0) 11.97 0
= GSC6974.171 225753.92 -265954.5 (2000.0) 12.13 0
= GSC6974.171 225753.99 -265954.4 (2000.0) 11.81 0
= USNO0600.24239249 225753.952 -265954.48 (2000.0)  9.5 11.8
= 2MASS 225753.928 -265954.24 (2000.0)  0.000  0.000  0.000
= 2MASS 225753.946 -265954.44 (2000.0)  5.576  0.000  0.000
= IRAS22551-2715 225511.7 -271556 (1950.0)
     F12=1.32  F25=0.58L F60=0.40L F100=1.32L
     VAR=-1 LRS=-1
  possibly I: oxygen-rich non-variable star without circumstellar shell
  or 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
= 225753.1 -265956 (2000.0) CD-27.16125 9.9
= 225754.7 -265952 (2000.0) IRAS22551-2715 1.309 0.605L 0.400L 1.325L -1%
= 225754.7 -265952 (2000.0) SSC22551-2715 1.309 0.605L 0.400L 1.325L
= 225755.1 -265947 (2000.0) FSC22552-2715 1.406 0.544 0.184L 0.653L
= 225754.0 -265953 (2000.0) 1064 1.46 TYC2-6974.171.1 (10.80 0.07) (12.51 0.22)

  Takamizawa's comment:

  The star may be a semiregular variable  with a range of 10.5-12.2p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV779        19940811.706  112p  Tmz.VSOLJ
TmzV779        19940930.646  118p  Tmz.VSOLJ
TmzV779        19941124.499  118p  Tmz.VSOLJ
TmzV779        19941222.390  120p  Tmz.VSOLJ
TmzV779        19950921.591  118p  Tmz.VSOLJ
TmzV779        19960721.725  122p  Tmz.VSOLJ
TmzV779        19970827.646  112p  Tmz.VSOLJ
TmzV779        19990708.626  116p  Tmz.VSOLJ
TmzV779        20000710.669  115p  Tmz.VSOLJ
TmzV779        20001215.382  105p  Tmz.VSOLJ

Observer's code:
  Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
       SASS (Saku All Sky Survey)
       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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