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[vsnet-obs 20245] New Takamizawa variable (TmzV346)

New Takamizawa variable (TmzV346)

   Kesao Takamizawa (Nagano, Japan) reports the discovery of a new variable
star (TmzV346).

TmzV346
= USNO0600.04144773 074106.042 -262519.26 (2000.0) 11.6 15.6
= IRAS07390-2618 073901.9 -261813 (1950.0)
    F12=1.58  F25=0.58  F60=0.40L F100=3.02L
    VAR=22 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
= 074105.5 -262516 (2000.0) IRAS07390-2618 1.559 0.554 0.400L 2.890L 22%
= 074105.5 -262516 (2000.0) SSC07390-2618 1.559 0.554 0.400L 2.890L

  Two nearby carbon stars; the identity should be checked.

074107.7 -262433 (2000.0) CS1834 - 9.5 8.8 -
074112.0 -262400 (2000.0) C(Buscombe) V=14.0 - -
074112.7 -262410 (2000.0) CS1836 - 14.0 11.5 -

  Takamizawa's comment:

  The star may be a semiregular variable with a range of 12.1-14.6p.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
TmzV346        940314.501  130p  Tmz.VSOLJ
TmzV346        941111.731  125p  Tmz.VSOLJ
TmzV346        950203.546  124p  Tmz.VSOLJ
TmzV346        950927.799  134p  Tmz.VSOLJ
TmzV346        951118.744  135p  Tmz.VSOLJ
TmzV346        951222.685  127p  Tmz.VSOLJ
TmzV346        961021.768  141p  Tmz.VSOLJ
TmzV346        961206.707  131p  Tmz.VSOLJ
TmzV346        970103.622  129p  Tmz.VSOLJ
TmzV346        970227.485  124p  Tmz.VSOLJ
TmzV346        971013.798  148p  Tmz.VSOLJ
TmzV346        971103.802  145p  Tmz.VSOLJ
TmzV346        971204.695  137p  Tmz.VSOLJ
TmzV346        971224.633  135p  Tmz.VSOLJ
TmzV346        980121.549  129p  Tmz.VSOLJ
TmzV346        980217.497  122p  Tmz.VSOLJ
TmzV346        980325.453  122p  Tmz.VSOLJ
TmzV346        981115.737  145p  Tmz.VSOLJ
TmzV346        981212.628  146p  Tmz.VSOLJ
TmzV346        990208.557  130p  Tmz.VSOLJ
TmzV346        990404.438  121p  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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