[vsnet-obs 19239] New Yamamoto variable (1834-25)

[Taichi Kato <tkato>]

New Yamamoto variable (1834-25)

   Minoru Yamamoto (Aichi, Japan) reports the discovery of a new variable
star (1834-25).

1834-25
= GSC6862.482 183429.68 -250535.0 (2000.0)  9.49 6
= GSC6862.482 183429.73 -250534.9 (2000.0)  9.92 6
= USNO0600.18637589 183429.656 -250535.02 (2000.0)  9.6 12.4 *
= IRAS18314-2507 183125.5 -250759 (1950.0)
    F12=3.31  F25=1.00  F60=0.44L F100=3.63L
    VAR=16 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
= 183428.4 -250526 (2000.0) CD-25.13260 9.6
= 183430.1 -250535 (2000.0) IRAS18314-2507 3.370 0.982 0.419L 3.600L 16%
= 183430.1 -250535 (2000.0) SSC18314-2507 3.370 0.982 0.419L 3.600L
= 183429.6 -250535 (2000.0) 1017E 1.63 TYC6862.482.1 plx=-4.5(50.0) (0.09 0.38)

  Likely variability type and range: SR, 9.8-10.6p

  Yamamoto's comment:

  The variablity of the star has been confirmed by Minoru Wakuda.

Photographic magnitude estimates by VSOLJ members

object         YYMMDD(UT)   mag  code
1834-25        940616.656   106  Ymo.VSOLJ
1834-25        950304.836   104  Ymo.VSOLJ
1834-25        950311.816   101  Ymo.VSOLJ
1834-25        950318.819   103  Ymo.VSOLJ
1834-25        950401.808   105  Ymo.VSOLJ
1834-25        950407.775   104  Ymo.VSOLJ
1834-25        950522.606   103  Ymo.VSOLJ
1834-25        950527.639   104  Ymo.VSOLJ
1834-25        950601.601   104  Ymo.VSOLJ
1834-25        950616.557   105  Ymo.VSOLJ
1834-25        950629.578   104  Ymo.VSOLJ
1834-25        950724.544   103  Ymo.VSOLJ
1834-25        950731.546   104  Ymo.VSOLJ
1834-25        950824.522   104  Ymo.VSOLJ
1834-25        950917.438   103  Ymo.VSOLJ
1834-25        951013.417   102  Ymo.VSOLJ
1834-25        951017.437   102  Ymo.VSOLJ
1834-25        951020.411   102  Ymo.VSOLJ
1834-25        960221.848   103  Ymo.VSOLJ
1834-25        960301.838   102  Ymo.VSOLJ
1834-25        960318.806    99  Ymo.VSOLJ
1834-25        960322.798   103  Ymo.VSOLJ
1834-25        960420.728   100  Ymo.VSOLJ
1834-25        960512.629    99  Ymo.VSOLJ
1834-25        960524.676   100  Ymo.VSOLJ
1834-25        960713.517   101  Ymo.VSOLJ
1834-25        960805.501   102  Ymo.VSOLJ
1834-25        960812.548   104  Ymo.VSOLJ
1834-25        960902.445   105  Ymo.VSOLJ
1834-25        961013.398   104  Ymo.VSOLJ
1834-25        961016.388   102  Ymo.VSOLJ
1834-25        970317.791   103  Ymo.VSOLJ
1834-25        970407.765   103  Ymo.VSOLJ
1834-25        970411.762   103  Ymo.VSOLJ
1834-25        970506.699    98  Ymo.VSOLJ
1834-25        970509.751   101  Ymo.VSOLJ
1834-25        970517.721   103  Ymo.VSOLJ
1834-25        970520.717   103  Ymo.VSOLJ
1834-25        970531.646   103  Ymo.VSOLJ
1834-25        970606.645   103  Ymo.VSOLJ
1834-25        970629.561   102  Ymo.VSOLJ
1834-25        970704.571   105  Ymo.VSOLJ
1834-25        970706.554   103  Ymo.VSOLJ
1834-25        970802.562   103  Ymo.VSOLJ
1834-25        970823.509   102  Ymo.VSOLJ
1834-25        970827.483   102  Ymo.VSOLJ
1834-25        970903.504    99  Ymo.VSOLJ
1834-25        970904.429   100  Ymo.VSOLJ
1834-25        970919.412   104  Ymo.VSOLJ
1834-25        970928.412   105  Ymo.VSOLJ
1834-25        971005.401   106  Ymo.VSOLJ
1834-25        971019.408   104  Ymo.VSOLJ
1834-25        971026.390    98  Ymo.VSOLJ
1834-25        971101.379   101  Ymo.VSOLJ
1834-25        980226.838    98  Ymo.VSOLJ
1834-25        980302.831    98  Ymo.VSOLJ

Observer's code:
  Ymo: M. Yamamoto ( Aichi, Japan ) instruments:f200mmPO0 + Tmax400
       Seq: H/T (110,105,100)

Relayed from Minoru Yamamoto <HFB02670@nifty.ne.jp>

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