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[vsnet-obs 18926] New Takamizawa variable (TmzV172)

New Takamizawa variable (TmzV172)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV172).

TmzV172
= GSC3744.340 043142.04 +581806.4 (2000.0) 12.40 1
= USNO1425.05360737 043142.057 +581806.33 (2000.0) 10.9 15.1
= IRAS04274+5811 042728.2 +581141 (1950.0)
    F12=0.69  F25=0.28  F60=0.40L F100=8.31L
    VAR= 7 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
= 043141.5 +581806 (2000.0) IRAS04274+5811 0.711 0.274 0.400L 8.360L 7%
= 043141.5 +581806 (2000.0) SSC04274+5811 0.711 0.274 0.400L 8.360L

  Takamizawa's comment:

  The star may be a semiregular variable (SR) with a range of 12.2-13.0p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV172        941108.549  126p  Tmz.VSOLJ
TmzV172        941224.463  129p  Tmz.VSOLJ
TmzV172        950127.497  123p  Tmz.VSOLJ
TmzV172        950127.506  123p  Tmz.VSOLJ
TmzV172        970802.715  130p  Tmz.VSOLJ
TmzV172        971010.696  128p  Tmz.VSOLJ
TmzV172        971010.738  127p  Tmz.VSOLJ
TmzV172        971123.518  125p  Tmz.VSOLJ
TmzV172        971221.472  127p  Tmz.VSOLJ
TmzV172        980116.455  128p  Tmz.VSOLJ
TmzV172        980820.699  125p  Tmz.VSOLJ
TmzV172        980823.706  123p  Tmz.VSOLJ
TmzV172        981024.551  125p  Tmz.VSOLJ
TmzV172        990109.489  122p  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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