[vsnet-obs 19280] New Takamizawa variable (TmzV231)

[Taichi Kato <tkato>]

New Takamizawa variable (TmzV231)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV231).

TmzV231
= GSC4105.297 064835.28 +642059.5 (2000.0) 10.46 1
= USNO1500.04724643 064835.289 +642059.53 (2000.0) 10.5 99.9
= IRAS06437+6424 064345.4 +642421 (1950.0)
    F12=1.10  F25=0.33  F60=0.40L F100=1.00L
    VAR= 8 LRS=-1
 possibly I: oxygen-rich non-variable star without 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
= 064834.4 +642057 (2000.0) FSC06437+6424 0.948 0.310 0.115L 0.600L
= 064835.5 +642100 (2000.0) IRAS06437+6424 1.073 0.341 0.400L 1.000L 8%
= 064835.5 +642100 (2000.0) SSC06437+6424 1.073 0.341 0.400L 1.000L
= 064835.2 +642059 (2000.0) 1083 1.35 TYC4105.297.1 plx=5.0(53.7) (0.10 0.29)
= 064741.2 +642047 (2000.0) DO30821

  Takamizawa's comment:

  The star may be a semiregurar variable  with  a range of 10.3-11.4p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV231        950203.472  112p  Tmz.VSOLJ
TmzV231        951219.553  107p  Tmz.VSOLJ
TmzV231        960112.473  111p  Tmz.VSOLJ
TmzV231        971109.684  111p  Tmz.VSOLJ
TmzV231        971123.546  114p  Tmz.VSOLJ
TmzV231        971224.576  113p  Tmz.VSOLJ
TmzV231        971231.597  112p  Tmz.VSOLJ
TmzV231        980318.443  104p  Tmz.VSOLJ
TmzV231        980325.477  103p  Tmz.VSOLJ
TmzV231        981115.680  109p  Tmz.VSOLJ
TmzV231        981218.623  108p  Tmz.VSOLJ
TmzV231        990109.535  114p  Tmz.VSOLJ
TmzV231        990204.438  110p  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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