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[vsnet-obs 19873] New Takamizawa variable (TmzV299)

New Takamizawa variable (TmzV299)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV299).  The variable is identical with TASV0739+15 = NSV17556;
the present independent discovery seems to confirm the claimed variability.

TmzV299
= GSC1361.794 074204.12 +152033.2 (2000.0) 10.65 1
= USNO1050.05435009 074204.133 +152033.01 (2000.0) 10.7 13.4 *
= IRAS07392+1527 073913.7 +152740 (1950.0)
    F12=1.44  F25=0.63  F60=0.40L F100=1.00L
    VAR=28 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
= 074204.0 +152033 (2000.0) IRAS07392+1527 1.495 0.637 0.400L 1.000L 28%
= 074204.0 +152033 (2000.0) SSC07392+1527 1.495 0.637 0.400L 1.000L
= 074204.1 +152033 (2000.0) TASV0739+15 10.3 11.3 
= 074205.0 +151958 (2000.0) DO13246
= 074205.1 +152030 (2000.0) FSC07392+1527 1.509 0.612 0.164 0.988L
= 074204.0 +152032 (2000.0) NSV17556 LB 10.2 11.3 P M0

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 11.0-12.1p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV299        940306.459  121p  Tmz.VSOLJ
TmzV299        950220.493  113p  Tmz.VSOLJ
TmzV299        951025.756  110p  Tmz.VSOLJ
TmzV299        951222.656  116p  Tmz.VSOLJ
TmzV299        961015.812  113p  Tmz.VSOLJ
TmzV299        961206.683  116p  Tmz.VSOLJ
TmzV299        970830.794  112p  Tmz.VSOLJ
TmzV299        970929.784  111p  Tmz.VSOLJ
TmzV299        971103.778  112p  Tmz.VSOLJ
TmzV299        971204.729  117p  Tmz.VSOLJ
TmzV299        971224.658  117p  Tmz.VSOLJ
TmzV299        980121.572  116p  Tmz.VSOLJ
TmzV299        980217.522  118p  Tmz.VSOLJ
TmzV299        980919.760  111p  Tmz.VSOLJ
TmzV299        981115.761  113p  Tmz.VSOLJ
TmzV299        981212.653  113p  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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