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[vsnet-obs 18250] New Takamizawa variable (TmzV105)

New Takamizawa variable (TmzV105)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV105).

TmzV105
= USNO0675.02774013 065406.586 -150710.92 (2000.0) 14.4 18.5
= IRAS06518-1503 065150.7 -150322 (1950.0)
    F12=1.00  F25=0.44  F60=0.40L F100=2.09L
    VAR=83 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
= 065406.8 -150711 (2000.0) IRAS06518-1503 1.043 0.438 0.400L 2.181L 83%
= 065406.8 -150711 (2000.0) SSC06518-1503 1.043 0.438 0.400L 2.181L
= 065407.2 -150722 (2000.0) HD50799 *B8IB/II(Michigan)

   Takamizawa's comment:

   The star may be a semiregular variable (SR) or Mira-type with a range 
of 14.8-<15.1p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV105        940314.492  148p  Tmz.VSOLJ
TmzV105        940402.447  148p  Tmz.VSOLJ
TmzV105        941203.712  <150p  Tmz.VSOLJ
TmzV105        950219.513  <150p  Tmz.VSOLJ
TmzV105        950927.807  151p  Tmz.VSOLJ
TmzV105        951219.624  <151p  Tmz.VSOLJ
TmzV105        961021.752  149p  Tmz.VSOLJ
TmzV105        961206.659  148p  Tmz.VSOLJ
TmzV105        971203.662  <150p  Tmz.VSOLJ
TmzV105        971231.571  <150p  Tmz.VSOLJ
TmzV105        981115.728  <150p  Tmz.VSOLJ

Observer: 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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