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[vsnet-newvar 1144] New Takamizawa variable (TmzV833)

New Takamizawa variable (TmzV833)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV833).

TmzV833
= GSC6933.1240 204246.33 -292914.3 (2000.0) 12.07 0
= USNO0600.23443475 204246.310 -292914.53 (2000.0) 10.3 12.9
= IRAS20397-2940 203943.2 -294006 (1950.0)
     F12=1.20  F25=0.36  F60=0.40L F100=1.00L
     VAR=36 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
= 204246.4 -292906 (2000.0) CD-29.17273 10.0
= 204245.7 -292917 (2000.0) IRAS20397-2940 1.222 0.365 0.400L 1.000L 36%
= 204245.7 -292917 (2000.0) SSC20397-2940 1.222 0.365 0.400L 1.000L
= 204245.8 -292914 (2000.0) FSC20397-2940 1.215 0.316 0.216L 0.600L
= 204246.3 -292914 (2000.0) 1113 1.01 TYC6933.1240.1 plx=-37.6(64.1) (0.15 0.28)
= 204246.3 -292915 (2000.0) 1136 0.71 TYC2-6933.1240.1 (11.44 0.10) (12.28 0.17)

  Takamizawa's comment:

  The star may be a semiregular variable  with a range of 11.3-12.1p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV833        19940803.592  120p  Tmz.VSOLJ
TmzV833        19940810.644  115p  Tmz.VSOLJ
TmzV833        19940930.544  119p  Tmz.VSOLJ
TmzV833        19941127.394  120p  Tmz.VSOLJ
TmzV833        19950723.663  119p  Tmz.VSOLJ
TmzV833        19950921.518  121p  Tmz.VSOLJ
TmzV833        19951020.433  113p  Tmz.VSOLJ
TmzV833        19960815.559  118p  Tmz.VSOLJ
TmzV833        19970706.694  121p  Tmz.VSOLJ
TmzV833        20011013.435  115p  Tmz.VSOLJ

Observer's code:
  Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
       SASS (Saku All Sky Survey)
       Inst.: 10cmR F4 twin patrol cameras and 25cm F2.8
       Baker-Schmidt camera T-Max400 120
       Comparison stars mag.:GSC

Relayed from Kesao Takamizawa <k-takamizawa@nifty.ne.jp>

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