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[vsnet-newvar 1451] New Takao variable (ToaV17)

New Takao variable (ToaV17)

   Akira Takao (Kita-kyushu, Japan) reports the discovery of a new variable
star (ToaV17).

ToaV17
= USNO0900.18750358 203038.639 +061040.38 (2000.0) 12.2 14.9
= IRAS20281+0600 202810.0 +060031 (1950.0)
     F12=0.58  F25=0.36  F60=0.40L F100=1.00L
     VAR= 0 LRS=-1
  possibly IIIa: variable star with more evolved O-rich c.s. shell
  or VIb: variable star with relatively hot dust close to
       the star and relatively cold dust at large distance
       may be O-rich
  or VII: variable star with more evolved C-rich circumstellar shell
= 203037.1 +061034 (2000.0) FSC20281+0600 0.611 0.242 0.191L 1.034L
= 203038.0 +061038 (2000.0) IRAS20281+0600 0.597 0.374 0.400L 1.000L 0%
= 203038.0 +061038 (2000.0) SSC20281+0600 0.597 0.374 0.400L 1.000L

  ToaV17  M: 10.2-(12.7C

CCD magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
ToaV17         20010816.545   <127C   Toa.VSOLJ
ToaV17         20010916.596   <111C   Toa.VSOLJ
ToaV17         20020319.840   <127C   Toa.VSOLJ
ToaV17         20020411.799   109C   Toa.VSOLJ
ToaV17         20020519.723   102C   Toa.VSOLJ
ToaV17         20020524.681   126V   Toa.VSOLJ *
ToaV17         20020524.688   102C   Toa.VSOLJ **

magnitude compared to GSC522.1497, GSC522.1198(also compared as Tycho
Catalog star)

Observer's code:
  Toa: Akira Takao (Kita-kyushu, Japan)
       Instruments:f120 - 200mm F4 Telephotolens, ST-8, unfiltered

       * 20cmSC, ST-8, Standard V-filter
       ** 20cmSC, ST-8, unfiltered

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

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