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[vsnet-newvar 183] New Takamizawa variable (TmzV643)

New Takamizawa variable (TmzV643)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV643).  The variable is identical with LD 246.

TmzV643
= GSC4263.653 220240.35 +613729.4 (2000.0) 13.46 6 N
= IRAS22011+6122 220107.8 +612257 (1950.0)
    F12=5.25  F25=1.58  F60=0.48L F100=5.25L
    VAR=30 LRS=-1
 possibly I: oxygen-rich non-variable star without circumstellar shell
 or VII: variable star with more evolved C-rich circumstellar shell
= 220240.3 +613730 (2000.0) LD246 12.4 14.7v SRa 350 
= 220240.8 +613728 (2000.0) IRAS22011+6122 5.094 1.555 0.504L 5.118L 30%
= 220240.8 +613728 (2000.0) SSC22011+6122 5.094 1.555 0.504L 5.118L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 13.4-<14.8p.

object         YYYYMMDD(UT)   mag  code
TmzV643        19940903.562  139p  Tmz.VSOLJ
TmzV643        19970824.567  135p  Tmz.VSOLJ
TmzV643        19970827.540  134p  Tmz.VSOLJ
TmzV643        19971218.437  <148p  Tmz.VSOLJ
TmzV643        19980823.562  143p  Tmz.VSOLJ
TmzV643        19980916.530  138p  Tmz.VSOLJ
TmzV643        19990709.574  148p  Tmz.VSOLJ
TmzV643        19990807.594  141p  Tmz.VSOLJ
TmzV643        19991226.462  142p  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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