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[vsnet-newvar 239] New Takamizawa variable (TmzV691)

New Takamizawa variable (TmzV691)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV691).

TmzV691
= GSC3994.1443 221507.32 +585247.2 (2000.0) 13.81 6
= USNO1425.13209166 221507.236 +585247.66 (2000.0) 13.9 15.4
= IRAS22133+5837 221323.8 +583738 (1950.0)
    F12=1.58  F25=0.58  F60=575.36L F100=691.74L
    VAR= 0 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
= 221508.4 +585235 (2000.0) IRAS22133+5837 1.530 0.555 552.500L 712.900L 0%

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 13.5-14.2p.

object         YYYYMMDD(UT)   mag  code
TmzV691        19940903.562  136p  Tmz.VSOLJ
TmzV691        19970824.567  140p  Tmz.VSOLJ
TmzV691        19970827.540  138p  Tmz.VSOLJ
TmzV691        19971218.437  142p  Tmz.VSOLJ
TmzV691        19980823.562  140p  Tmz.VSOLJ
TmzV691        19980916.530  140p  Tmz.VSOLJ
TmzV691        19990709.574  135p  Tmz.VSOLJ
TmzV691        19990807.594  137p  Tmz.VSOLJ
TmzV691        19991226.462  136p  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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