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[vsnet-obs 20059] New Takamizawa variable (TmzV321)

New Takamizawa variable (TmzV321)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV321).

TmzV321
= GSC5984.1460 074231.54 -175459.2 (2000.0) 12.36 0
= GSC5984.1460 074231.56 -175459.6 (2000.0) 12.57 0
= USNO0675.04767394 074231.558 -175459.27 (2000.0) 10.6 12.1
= IRAS07402-1747 074016.6 -174749 (1950.0)
    F12=1.00  F25=0.44  F60=0.40L F100=6.31L
    VAR=55 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
= 074230.8 -175457 (2000.0) IRAS07402-1747 1.003 0.416 0.400L 6.039L 55%
= 074230.8 -175457 (2000.0) SSC07402-1747 1.003 0.416 0.400L 6.039L
= 074223.9 -175400 (2000.0) M5(III)(Buscombe) - - -

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 11.3-13.1p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV321        940314.505  120p  Tmz.VSOLJ
TmzV321        941111.738  113p  Tmz.VSOLJ
TmzV321        950203.546  131p  Tmz.VSOLJ
TmzV321        950927.799  118p  Tmz.VSOLJ
TmzV321        951118.744  122p  Tmz.VSOLJ
TmzV321        951222.685  118p  Tmz.VSOLJ
TmzV321        960211.515  119p  Tmz.VSOLJ
TmzV321        961021.776  120p  Tmz.VSOLJ
TmzV321        961206.707  123p  Tmz.VSOLJ
TmzV321        970103.622  119p  Tmz.VSOLJ
TmzV321        970227.485  117p  Tmz.VSOLJ
TmzV321        971013.791  118p  Tmz.VSOLJ
TmzV321        971103.802  120p  Tmz.VSOLJ
TmzV321        971204.703  117p  Tmz.VSOLJ
TmzV321        971224.641  118p  Tmz.VSOLJ
TmzV321        980121.556  117p  Tmz.VSOLJ
TmzV321        980217.505  119p  Tmz.VSOLJ
TmzV321        980325.461  115p  Tmz.VSOLJ
TmzV321        981115.744  117p  Tmz.VSOLJ
TmzV321        981212.628  114p  Tmz.VSOLJ
TmzV321        990208.557  118p  Tmz.VSOLJ
TmzV321        990404.438  119p  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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