[vsnet-obs 19909] New Takamizawa variable (TmzV305)

[Taichi Kato <tkato>]

New Takamizawa variable (TmzV305)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV305).

TmzV305
= USNO0750.04094534 072247.105 -084855.16 (2000.0) 11.1 19.9
= IRAS07203-0843 072023.1 -084306 (1950.0)
    F12=3.63  F25=0.91  F60=0.40L F100=1.10L
    VAR=22 LRS=-1
 possibly I: oxygen-rich non-variable star without circumstellar shell
 or VIa: non-variable star with relatively cold dust at large
      distance, may be carbon-rich
= 072247.0 -084850 (2000.0) CS1681 - 11.8: - -
= 072247.1 -084855 (2000.0) IRAS07203-0843 3.478 0.940 0.400L 1.099L 22%
= 072247.1 -084855 (2000.0) SSC07203-0843 3.478 0.940 0.400L 1.099L

  Takamizawa's comment:

  The star may be a Mira-type variable with a range of 13.7-<15.3p.
The star is visible at mag 17.5 on Real-Sky CD.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV305        940314.509  146p  Tmz.VSOLJ
TmzV305        941111.738  137p  Tmz.VSOLJ
TmzV305        950203.556  146p  Tmz.VSOLJ
TmzV305        951222.676  153p  Tmz.VSOLJ
TmzV305        960211.515  151p  Tmz.VSOLJ
TmzV305        961021.776  152p  Tmz.VSOLJ
TmzV305        961206.699  153p  Tmz.VSOLJ
TmzV305        970103.614  <153p  Tmz.VSOLJ
TmzV305        970227.476  153p  Tmz.VSOLJ
TmzV305        971013.791  <153p  Tmz.VSOLJ
TmzV305        971103.794  <153p  Tmz.VSOLJ
TmzV305        971204.703  <153p  Tmz.VSOLJ
TmzV305        971224.641  <153p  Tmz.VSOLJ
TmzV305        980121.556  <153p  Tmz.VSOLJ
TmzV305        980325.461  <153p  Tmz.VSOLJ
TmzV305        981115.744  153p  Tmz.VSOLJ
TmzV305        981212.657  <153p  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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