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[vsnet-obs 20242] New Takamizawa variable (TmzV343)

New Takamizawa variable (TmzV343)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV343).

TmzV343
= GSC6557.450 075216.24 -242752.2 (2000.0) 12.87 0
= GSC6557.450 075216.25 -242751.4 (2000.0) 15.26 0 N
= USNO0600.04634328 075216.303 -242752.45 (2000.0)  9.5 15.2
= IRAS07501-2420 075009.3 -242004 (1950.0)
    F12=2.75  F25=0.83  F60=0.40L F100=1.20L
    VAR= 4 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
= 075216.1 -242749 (2000.0) CS1917 - 10.3 7.0 -
= 075216.1 -242751 (2000.0) IRAS07501-2420 2.819 0.858 0.400L 1.189L 4%
= 075216.1 -242751 (2000.0) SSC07501-2420 2.819 0.858 0.400L 1.189L
= 075212.0 -242700 (2000.0) C(Buscombe) V=10.3 - -

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 11.9-13.0p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV343        940314.501  120p  Tmz.VSOLJ
TmzV343        941111.731  120p  Tmz.VSOLJ
TmzV343        950203.546  122p  Tmz.VSOLJ
TmzV343        950927.799  123p  Tmz.VSOLJ
TmzV343        951118.744  129p  Tmz.VSOLJ
TmzV343        951222.685  126p  Tmz.VSOLJ
TmzV343        961021.768  124p  Tmz.VSOLJ
TmzV343        961206.707  123p  Tmz.VSOLJ
TmzV343        970103.622  123p  Tmz.VSOLJ
TmzV343        970227.485  124p  Tmz.VSOLJ
TmzV343        971013.798  119p  Tmz.VSOLJ
TmzV343        971103.802  120p  Tmz.VSOLJ
TmzV343        971204.695  122p  Tmz.VSOLJ
TmzV343        971224.633  125p  Tmz.VSOLJ
TmzV343        980121.549  128p  Tmz.VSOLJ
TmzV343        980217.497  127p  Tmz.VSOLJ
TmzV343        980325.453  130p  Tmz.VSOLJ
TmzV343        981115.737  129p  Tmz.VSOLJ
TmzV343        981212.628  126p  Tmz.VSOLJ
TmzV343        990208.557  126p  Tmz.VSOLJ
TmzV343        990404.438  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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