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[vsnet-obs 24110] New Takamizawa variable (TmzV598)

New Takamizawa variable (TmzV598)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV598).

TmzV598
= GSC4272.298 222950.24 +651923.0 (2000.0) 14.21 1
= USNO1500.09193170 222950.274 +651923.19 (2000.0) 14.0 17.9
= IRAS22281+6503 222811.8 +650350 (1950.0)
    F12=1.10  F25=0.58  F60=2.51L F100=69.17L
    VAR=48 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
= 222949.6 +651914 (2000.0) IRAS22281+6503 1.077 0.603 2.400L 68.970L 48%
= 222949.6 +651914 (2000.0) SSC22281+6503 1.077 0.603 2.400L 68.970L

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 13.4-14.7p.

  (Note: being in a molecular cloud, this star may be a pre-main sequence
   variable: type INB)

Visual magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV598        970827.540  140p  Tmz.VSOLJ
TmzV598        971218.437  137p  Tmz.VSOLJ
TmzV598        980823.563  147p  Tmz.VSOLJ
TmzV598        980916.530  143p  Tmz.VSOLJ
TmzV598        981107.440  145p  Tmz.VSOLJ
TmzV598        990709.574  134p  Tmz.VSOLJ
TmzV598        990807.594  138p  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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