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[vsnet-obs 19930] New Takamizawa variable (TmzV307)

New Takamizawa variable (TmzV307)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV307).

TmzV307
= USNO0750.04876801 073939.550 -104305.75 (2000.0) 13.3 18.3
= IRAS07372-1036 073717.4 -103610 (1950.0)
    F12=10.96  F25=6.31  F60=1.20  F100=1.00L
    VAR=99 LRS=29
    blue, 10micron (silicate) emission, strength=9
    IIIa: variable star with more evolved O-rich c.s. shell
= 073939.6 -104307 (2000.0) IRAS07372-1036 10.790 6.053 1.149 1.000L 99% 4(LRS)
= 073939.6 -104307 (2000.0) SSC07372-1036 10.790 6.053 1.149 1.000L
= 073936.0 -104159 (2000.0) M9:III:(Buscombe) - - -

  Takamizawa's comment:

  The star may be a Mira-type variable with a range of 14.3-<15.3p,
and a period of about 353days (JD24501133).

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV307        940314.509  149p  Tmz.VSOLJ
TmzV307        941111.738  <150p  Tmz.VSOLJ
TmzV307        950203.556  <153p  Tmz.VSOLJ
TmzV307        951222.676  150p  Tmz.VSOLJ
TmzV307        960211.515  <153p  Tmz.VSOLJ
TmzV307        961021.776  <148p  Tmz.VSOLJ
TmzV307        961206.699  153p  Tmz.VSOLJ
TmzV307        970103.614  <153  Tmz.VSOLJ
TmzV307        970227.476  <150p  Tmz.VSOLJ
TmzV307        971013.791  150p  Tmz.VSOLJ
TmzV307        971103.794  143p  Tmz.VSOLJ
TmzV307        971204.703  147p  Tmz.VSOLJ
TmzV307        971224.641  148p  Tmz.VSOLJ
TmzV307        980121.556  150p  Tmz.VSOLJ
TmzV307        980325.461  <153p  Tmz.VSOLJ
TmzV307        981115.744  144p  Tmz.VSOLJ
TmzV307        981212.657  144p  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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