[vsnet-newvar 847] New Haseda variable (HadV85)

[Taichi Kato <tkato>]

New Haseda variable (HadV85)

   Katsumi Haseda (Aichi, Japan) reports the discovery of a new variable
star (HadV85).  The star is close to the position of V4016 Sgr, for which
the identification with GSC7395.254 (181643.18 -300013.4) has been proposed.
However, the distortion in the chart of the discovery reports secure
identification difficult.  V4016 Sgr is sometimes identified with an
IRAS source IRAS18134-3002, which has an apparent optical counterpart
GSC7392.246 (181638.42 -300108.3).  This star is very bright in 2MASS,
which makes IRAS identification likely.  Haseda's observations confirms
the variability of GSC7395.254, but not for GSC7392.246.  There are at
least two variabile stars HadV85 and GSC7392.246.  The secure identification
of V4016 Sgr apparently await further study.

HadV85
= USNO0525.27519791 181641.476 -300037.07 (2000.0) 16.0 17.4
= 2MASS 181641.497 -300036.08 (2000.0)  7.919  7.013  6.587

  HadV85  M:  11.5-(12.9p

Photographic magnitude estimates by VSOLJ members

object         YYYYMMDD(UT)   mag  code
HadV85         19960815.593  115p  Had.VSOLJ
HadV85         19961029.393  <128p  Had.VSOLJ
HadV85         19970317.817  118p  Had.VSOLJ
HadV85         19970517.729  <128p  Had.VSOLJ
HadV85         19970606.681  <128p  Had.VSOLJ
HadV85         19980228.829  125p  Had.VSOLJ
HadV85         19980307.812  127p  Had.VSOLJ
HadV85         19980402.778  118p  Had.VSOLJ
HadV85         19980425.728  116p  Had.VSOLJ
HadV85         19980429.734  117p  Had.VSOLJ
HadV85         19980503.742  120p  Had.VSOLJ
HadV85         19980522.705  117p  Had.VSOLJ
HadV85         19980615.550  121p  Had.VSOLJ
HadV85         19980814.533  126p  Had.VSOLJ
HadV85         19990313.803  <128p  Had.VSOLJ
HadV85         19990831.475  <128p  Had.VSOLJ
HadV85         20000212.851  <128p  Had.VSOLJ
HadV85         20000313.827  127p  Had.VSOLJ
HadV85         20000401.806  <128p  Had.VSOLJ
HadV85         20000412.767  <128p  Had.VSOLJ
HadV85         20000416.772  <128p  Had.VSOLJ
HadV85         20000429.722  <129p  Had.VSOLJ
HadV85         20000508.745  <128p  Had.VSOLJ
HadV85         20000601.608  <128p  Had.VSOLJ
HadV85         20000702.635  <128p  Had.VSOLJ
HadV85         20000708.622  125p  Had.VSOLJ
HadV85         20000716.588  <126p  Had.VSOLJ
HadV85         20000822.519  126p  Had.VSOLJ
HadV85         20000917.485  121p  Had.VSOLJ
HadV85         20010226.841  126p  Had.VSOLJ
HadV85         20010326.805  117p  Had.VSOLJ
HadV85         20010422.749  115p  Had.VSOLJ

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

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