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[vsnet-obs 20073] New Takamizawa variable (TmzV322)

New Takamizawa variable (TmzV322)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV322).

TmzV322
= GSC5982.1287 075405.26 -161717.0 (2000.0) 12.18 0
= GSC5982.1287 075405.28 -161716.2 (2000.0) 12.30 0
= USNO0675.05310248 075405.273 -161716.41 (2000.0)  9.2 12.3
= IRAS07517-1609 075147.8 -160918 (1950.0)
    F12=1.20  F25=0.44  F60=0.40L F100=1.10L
    VAR=23 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
= 075404.3 -161712 (2000.0) IRAS07517-1609 1.238 0.432 0.400L 1.055L 23%
= 075404.3 -161712 (2000.0) SSC07517-1609 1.238 0.432 0.400L 1.055L
= 075400.0 -161559 (2000.0) M6(III)(Buscombe) - - -

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 11.2-12.7p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV322        940314.505  121p  Tmz.VSOLJ
TmzV322        941111.738  124p  Tmz.VSOLJ
TmzV322        950203.546  120p  Tmz.VSOLJ
TmzV322        950927.799  120p  Tmz.VSOLJ
TmzV322        951118.744  118p  Tmz.VSOLJ
TmzV322        951222.685  118p  Tmz.VSOLJ
TmzV322        960211.515  123p  Tmz.VSOLJ
TmzV322        961021.776  121p  Tmz.VSOLJ
TmzV322        970103.622  127p  Tmz.VSOLJ
TmzV322        970227.485  116p  Tmz.VSOLJ
TmzV322        971013.791  121p  Tmz.VSOLJ
TmzV322        971103.802  115p  Tmz.VSOLJ
TmzV322        971204.703  114p  Tmz.VSOLJ
TmzV322        971224.641  112p  Tmz.VSOLJ
TmzV322        980121.556  119p  Tmz.VSOLJ
TmzV322        980217.505  120p  Tmz.VSOLJ
TmzV322        981115.744  121p  Tmz.VSOLJ
TmzV322        981212.628  125p  Tmz.VSOLJ
TmzV322        990208.557  121p  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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