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[vsnet-newvar 1341] Confirmation of variability of NSV 15209 (Takamizawa)

Confirmation of variability of NSV 15209 (Takamizawa)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a variable
star, which is identified with NSV 15209.  The variability is confirmed.

NSV15209
= GSC4029.904 005718.55 +672028.7 (2000.0) 13.38 1
= USNO1500.01002603 005718.504 +672028.62 (2000.0) 12.4 17.0
= IRAS00540+6704 005405.9 +670410 (1950.0)
     F12=1.10  F25=0.36  F60=0.40L F100=3.02L
     VAR= 0 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
= 005717.8 +672022 (2000.0) IRAS00540+6704 1.053 0.355 0.400L 2.990L 0%
= 005717.8 +672022 (2000.0) SSC00540+6704 1.053 0.355 0.400L 2.990L
= 005718.1 +672031 (2000.0) MSX5C_G123.4984+04.4769 -24 -12 1 -1 0 -3 V(%):-:-:0:-:-:-
= 005718.5 +672028 (2000.0) NSV15209 ? 13.0 <15.0 V - - - -

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 13.6-14.5p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
NSV15209       19950120.474  141p  Tmz.VSOLJ
NSV15209       19970517.718  136p  Tmz.VSOLJ
NSV15209       19970703.727  138p  Tmz.VSOLJ
NSV15209       19980116.397  137p  Tmz.VSOLJ
NSV15209       19980823.617  138p  Tmz.VSOLJ
NSV15209       19981011.414  142p  Tmz.VSOLJ
NSV15209       19990105.447  138p  Tmz.VSOLJ
NSV15209       20000529.751  140p  Tmz.VSOLJ
NSV15209       20001216.393  140p  Tmz.VSOLJ
NSV15209       20010520.749  145p  Tmz.VSOLJ
NSV15209       20011116.528  141p  Tmz.VSOLJ

Observer's code:
  Tmz: K.Takamizawa (Saku-machi,Nagano,Japan)
       SASS (Saku All Sky Survey)
       Inst.: 10cmR F4 twin patrol cameras and 25cm F2.8
       Baker-Schmidt camera T-Max400 120
       Comparison stars mag.:GSC

Relayed from Kesao Takamizawa <k-takamizawa@nifty.ne.jp>

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