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[vsnet-obs 18167] New Takamizawa variable (TmzV90)

New Takamizawa variable (TmzV90)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV90).

TmzV90
= GSC6598.2345 090414.68 -292939.6 (2000.0) 12.26 0
= USNO0600.07173278 090414.700 -292939.66 (2000.0) 13.0 16.9
= IRAS09021-2917 090206.3 -291738 (1950.0)
    F12=4.78  F25=1.58  F60=0.40L F100=1.00L
    VAR=98 LRS=-1
 possibly I: oxygen-rich non-variable star without circumstellar shell
 or VII: variable star with more evolved C-rich circumstellar shell
= 090413.7 -292936 (2000.0) IRAS09021-2917 4.582 1.621 0.400L 1.000L 98%
= 090413.7 -292936 (2000.0) SSC09021-2917 4.582 1.621 0.400L 1.000L
= 090415.6 -292947 (2000.0) FSC09021-2917 3.771 1.710 0.228 1.483L

  Takamizawa's comment:

  The star may be a Mira-type variable  with a range of 12.7-<15.2p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV90         950203.647  147p  Tmz.VSOLJ
TmzV90         950401.487  <152p  Tmz.VSOLJ
TmzV90         980102.680  151p  Tmz.VSOLJ
TmzV90         980325.497  127p  Tmz.VSOLJ
TmzV90         981123.786  135p  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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