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[vsnet-obs 18893] New Takamizawa variable (TmzV170)

New Takamizawa variable (TmzV170)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV170).

TmzV170
= GSC4077.415 042936.64 +664548.1 (2000.0) 13.40 1
= USNO1500.03766501 042936.627 +664548.25 (2000.0) 12.5 16.5
= IRAS04246+6639 042439.7 +663912 (1950.0)
    F12=1.20  F25=0.58  F60=0.40L F100=1.58L
    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
= 042935.9 +664546 (2000.0) IRAS04246+6639 1.152 0.556 0.400L 1.531L 0%
= 042935.9 +664546 (2000.0) SSC04246+6639 1.152 0.556 0.400L 1.531L
= 042937.6 +664549 (2000.0) FSC04246+6639 1.207 0.636 0.194L 2.073L

  Takamizawa's comment:

  The star may be a semiregular variable (SR) with a range of 13.2-14.3p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV170        950127.497  138p  Tmz.VSOLJ
TmzV170        951128.592  141p  Tmz.VSOLJ
TmzV170        970802.715  138p  Tmz.VSOLJ
TmzV170        971123.522  138p  Tmz.VSOLJ
TmzV170        971123.579  137p  Tmz.VSOLJ
TmzV170        971221.449  142p  Tmz.VSOLJ
TmzV170        980116.455  141p  Tmz.VSOLJ
TmzV170        980820.699  132p  Tmz.VSOLJ
TmzV170        980823.706  134p  Tmz.VSOLJ
TmzV170        981024.551  143p  Tmz.VSOLJ
TmzV170        981218.581  141p  Tmz.VSOLJ
TmzV170        990109.489  140p  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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