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[vsnet-obs 36680] V657 Cas = NSV14731: large-amplitude variation and revised position by Toa

V657 Cas = NSV14731: large-amplitude variation and revised position by Toa

   Akira Takao (Kita-kyushu, Japan) reports the discovery of large-amplitude
variation in V657 Cas.

V657 Cas = NSV 14731
= IRAS23496+6131 234936.5 +613133 (1950.0)
    F12=363.02  F25=251.14  F60=43.64  F100=12.02 
    VAR=25 LRS=27
    blue, 10micron (silicate) emission, strength=7
    IIIa: variable star with more evolved O-rich c.s. shell
= 235204.7 +614812 (2000.0) MSX5C_G115.9812-00.2644 289 288 409 471 348 366 V(%):1:-:15:2:1:1
= 235205.2 +614814 (2000.0) IRAS23496+6131 369.000 254.700 45.260 11.730 25% 4(LRS)
= 235205.2 +614814 (2000.0) SSC23496+6131 369.000 254.700 45.260 11.730
= 235207.7 +614847 (2000.0) RAFGL3165
= 235207.7 +614847 (2000.0) TMSS+60427

   This observation supports that the star is a large-amplitude Mira star.

   Takao also provides the following revised position of this star:

   235204.9 +614813 (J2000.0)

CCD magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
CASV657        20001104.608  137C  Toa.VSOLJ
CASV657        20011031.538  110C  Toa.VSOLJ

mag compared to GSC4285.2986, GSC4285.2957, GSC4281.488

Observer's code:
  Toa: Akira Takao (Kita-kyushu, Japan)
       instruments:f200mm F4 Telephotolens+ST-8,unfiltered

Relayed from Akira Takao <drtakao@bronze.ocn.ne.jp>

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