TYC 2463-00303-1(mag9.9) by (2333)Porthan on 2019 Dec. 03

** Prediction: 
Long.:  138o 03' 12" E, Lat.: 34o 51' 49" N
PredTime:    20h 03m 47.7s

**** Successful observations:
Observer:    Akira Asai  (JOIN:19536,19538,19565)
Place:       Tsu, Mie, Japan
Long.: 136o 32' 51.7" E, Lat.: 34o 46' 47.3" N, Height: 3m (JGD2000=WGS84)
Method:      VCR, 10cm F4 Refractor, TGv-M(Slow shutter 32Fr), Limovie
Time signal: IOTA-VTI
Result:      D 20h 03m 56.30s
             R 20h 03m 57.22s (V shape reappearance)
             (TGv-M delay -0.292s corrected)
Note: The mag drop occured approx 25% only. Possibly unknown multiple star.

Observer:    Miyoshi Ida  (JOIN:19551)
Place:       Tsu, Mie, Japan
Long.: 136o 34' 01.2" E, Lat.: 34o 48' 07.8" N, Height: 5m (JGD2000=WGS84)
Method:      Movie, 20cm F10 Schmidt Cass, Reducer 3.3, Reducer 6.3, ASI224MC(exp0.01s), Binning:2
Time signal: GHS15
Result:      D1 20h 03m 55.97s +/-0.01s 1.6 mag down
             D2 20h 03m 56.04s +/-0.01s 2.57mag down
             R1 20h 03m 56.54s +/-0.01s 1.69mag up
             R2 20h 03m 56.59s +/-0.01s upto origin mag
             D3 20h 03m 56.76s +/-0.01s 0.16mag down
             R3 20h 03m 57.53s +/-0.01s upto origin mag
Note: Miyoshi Ida reported complex behavior.

** Negative observations:
Observer:    Minoru Owada  (JOIN:19531)
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

Observer:    Hidehito Yamamura  (JOIN:19541)
Place:       Iwata, Shizuoka, Japan
Long.: 137o 50' 57.5" E, Lat.: 34o 40' 08.1" N, Height: 2m (JGD2000=WGS84)
Method:      Movie, 20.3cm F10 Schmidt Cass, ASI224MC(exp0.033s), Binning:2, SharpCap
Time signal: GHS-OSD,Satk,TEL