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[vsnet-j 2228] HadV106

HadV106

　もしかすると変わった天体かも知れないのでこちらにも挙げておきます。
　ミラ型星で位相がたまたまだったのかも知れませんが、最近になって暗くなった
　可能性もあります。

New Haseda variable (HadV106)

   Katsumi Haseda (Aichi, Japan) reports the discovery of a new variable
star (HadV106).  Although the amplitude and the IRAS flux may suggest a
Mira-type variable, the object may have been systematically bright before
2001.  The current fading therefore may be a temporary one rather than a
result of pulsation.  Further search for archival photographs is encouraged.

HadV106
= GSC2160.1512 202626.07 +243039.0 (2000.0) 11.37 1
= USNO1125.16227839 202626.094 +243038.59 (2000.0) 11.5 14.5
= 2MASS 202626.088 +243038.88 (2000.0)  0.000  0.000  0.000
= IRAS20242+2420 202416.3 +242042 (1950.0)
    F12=1.58  F25=0.63  F60=0.40L F100=6.92L
    VAR= 0 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
= 202625.5 +243035 (2000.0) IRAS20242+2420 1.648 0.614 0.400L 7.166L 0%
= 202625.5 +243035 (2000.0) SSC20242+2420 1.648 0.614 0.400L 7.166L
= 202625.9 +243038 (2000.0) 1158 1.93 TYC2-2160.1512.1 (11.78 0.14) (14.06 0.44)

  HadV106  M: 11.3-13.2p

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
HadV106        19981108.434  113p  Had.VSOLJ
HadV106        19990322.809  115p  Had.VSOLJ
HadV106        19990517.760  115p  Had.VSOLJ
HadV106        19990611.668  114p  Had.VSOLJ
HadV106        20000604.719  113p  Had.VSOLJ
HadV106        20000810.624  113p  Had.VSOLJ
HadV106        20001207.419  116p  Had.VSOLJ
HadV106        20010225.824  122p  Had.VSOLJ
HadV106        20010615.653  124p  Had.VSOLJ
HadV106        20011106.461  120p  Had.VSOLJ
HadV106        20020508.676  130p  Had.VSOLJ
HadV106        20020527.726  <124p  Had.VSOLJ
HadV106        20020710.711  132p  Had.VSOLJ
HadV106        20020722.598  <130p  Had.VSOLJ
HadV106        20020731.575  <130p  Had.VSOLJ

Observer's code:
  Had: K. Haseda (Aichi, Japan)
       Instruments: 10cm F4.0 twin patrol camera +T-Max400(120)

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