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[vsnet-obs 19025] New Takamizawa variable (TmzV188)

New Takamizawa variable (TmzV188)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV188).

TmzV188
= GSC3340.336 041745.63 +521305.3 (2000.0) 13.33 1
= GSC3340.336 041745.84 +521305.3 (2000.0) 13.32 1
= USNO1350.04533453 041745.742 +521304.99 (2000.0) 12.1 15.6
= IRAS04139+5205 041354.5 +520545 (1950.0)
    F12=1.00  F25=0.33  F60=0.40L F100=2.75L
    VAR= 2 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
= 041745.4 +521304 (2000.0) IRAS04139+5205 0.991 0.336 0.400L 2.822L 2%
= 041745.4 +521304 (2000.0) SSC04139+5205 0.991 0.336 0.400L 2.822L

  Takamizawa's comment:

  The star may be a semiregular variable  with  a renge of 12.8-13.7p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV188        940910.701  130p  Tmz.VSOLJ
TmzV188        941108.549  131p  Tmz.VSOLJ
TmzV188        950823.720  133p  Tmz.VSOLJ
TmzV188        951127.554  128p  Tmz.VSOLJ
TmzV188        970714.728  133p  Tmz.VSOLJ
TmzV188        970802.707  131p  Tmz.VSOLJ
TmzV188        971010.696  134p  Tmz.VSOLJ
TmzV188        971123.526  130p  Tmz.VSOLJ
TmzV188        971221.456  131p  Tmz.VSOLJ
TmzV188        980820.706  132p  Tmz.VSOLJ
TmzV188        990109.498  137p  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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