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[vsnet-obs 17932] New Takamizawa variable (TmzV80)

New Takamizawa variable (TmzV80)

  Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV80).

TmzV80 = 
GSC4222.2085 182317.82 +642037.6 (2000.0) 12.78 1
USNO1500.06552085 182317.871 +642037.45 (2000.0) 12.4 15.2
IRAS18230+6418 182302.9 +641856 (1950.0)
    F12=1.44  F25=0.69  F60=0.48L F100=1.00L
    VAR=98 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
182317.3 +642037 (2000.0) FSC18230+6418 1.298 0.632 0.136 0.504L
182318.3 +642037 (2000.0) IRAS18230+6418 1.505 0.719 0.474L 1.000L 98%
182318.3 +642037 (2000.0) SSC18230+6418 1.505 0.719 0.474L 1.000L

  Takamizawa's comment:

  The star may be a Mira-type classification with a range of 11.8-<15.0p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV80         960525.626  <135p  Tmz.VSOLJ
TmzV80         970506.621  <137p  Tmz.VSOLJ
TmzV80         980420.644  <145p  Tmz.VSOLJ
TmzV80         980520.611  <150p  Tmz.VSOLJ
TmzV80         980615.510  <137p  Tmz.VSOLJ
TmzV80         981108.392  118p  Tmz.VSOLJ
TmzV80         981108.396  118p  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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