TYC 1865-01119-1(mag 9.3) by (177)Irma on 2012 Feb. 18

**** Successful observations:
Observer:    Masayuki Ishida   (JOIN:13515,13554)
Place:       Taiki, Mie, Japan
Long.: 136o 23' 55.3" E, Lat.: 34o 12' 41.7" N, Height: 90m (JGD2000=WGS84)
Method:      VCR, 20cm F10 Schmidt Cass, F6.3 Reducer, WAT-120N(slow shutter 8Fr), Limovie
Time signal: GHS-OSD
Result:      D brighter: 16h50m05.702s +/- 0.042s
             D fainter : 16h50m11.090s +/- 0.054s
             R brighter: 16h50m16.022s +/- 0.044s
             R fainter : 16h50m21.174s +/- 0.478s
             (WAT-120N delay corrected)
Note: This star must be unknown double star. The stepwise event was recorded clearly.
      The derived magnitudes
        from disappearance / Brighter comp: 9.58 +/- 0.04mag , Fainter comp: 10.73 +/- 0.07 mag.
        from re-appearance / Brighter comp: 9.54 +/- 0.05mag , Fainter comp: 10.87 +/- 0.18 mag.
Note: VCR analyzed by Kazuhisa Miyashita.

** Negative observations:
Observer:    Hayato Watanabe (JOIN:13512)
Place:       Inabe, Mie, Japan
Long.: 136o 33' 33.9" E, Lat.: 35o 07' 10.2" N, Height: 92m (JGD2000=WGS84)
Method:      VCR, 13cm F7.7 Refractor, WAT-120N(Slow shutter 8Fr)
Time signal: GHS-OSD

Observer:    Naoto Tatsumi    (JOIN:13518)
Place:       Akaiwa-Ryuten-obs, Akaiwa, Okayama, Japan
Long.: 134o 00' 08" E, Lat.: 34o 53' 38" N, Height: 470m (JGD2000=WGS84)
Method:      VCR, 40cm F4 Newtonian, I.I., Limovie
Time signal: BPM

Observer:    Minoru Owada  (JOIN:13519)
Place:       Hamamatsu, Shizuoka, Japan
Long.: 137o 44' 23.0" E, Lat.: 34o 43' 07.0" N, Height: 17m (JGD2000=WGS84)
Method:      VCR, 25cm F12 Schmidt Cass, F9.3Reducer, WAT-120N(Slow shutter 2Fr)
Time signal: GHS-OSD