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[vsnet-newvar 1339] New Takamizawa variable (TmzV940)

New Takamizawa variable (TmzV940)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV940).

TmzV940
= GSC4025.2005 005656.15 +642700.9 (2000.0) 12.63 1 N
= USNO1500.00996660 005656.230 +642701.26 (2000.0) 11.8 19.4
= IRAS00538+6410 005349.9 +641054 (1950.0)
     F12=1.10  F25=0.40  F60=0.40L F100=12.02L
     VAR=15 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
= 005655.9 +642700 (2000.0) CS143 - >13.5 -9.9 -
= 005655.9 +642701 (2000.0) MSX5C_G123.5246+01.5851 -27 -14 2 2 -1 -4 V(%):-:-:2:-:-:-
= 005656.8 +642706 (2000.0) IRAS00538+6410 1.073 0.395 0.400L 12.220L 15%
= 005656.8 +642706 (2000.0) SSC00538+6410 1.073 0.395 0.400L 12.220L
= 005700.0 +642759 (2000.0) C5:,4(Buscombe) V=12.8 B-V=1.03 U-B=.87

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 12.9-13.9p.

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
TmzV940        19950120.474  132p  Tmz.VSOLJ
TmzV940        19970517.718  131p  Tmz.VSOLJ
TmzV940        19970703.727  130p  Tmz.VSOLJ
TmzV940        19980116.397  134p  Tmz.VSOLJ
TmzV940        19980823.617  129p  Tmz.VSOLJ
TmzV940        19981011.414  133p  Tmz.VSOLJ
TmzV940        19990105.447  135p  Tmz.VSOLJ
TmzV940        20000529.751  137p  Tmz.VSOLJ
TmzV940        20001216.393  139p  Tmz.VSOLJ
TmzV940        20010520.749  132p  Tmz.VSOLJ
TmzV940        20011116.528  131p  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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