ASTEROIDAL OCCULTATION - REPORT FORM

    +------------------------------+  +------------------------------+
    |            EAON              |  |            IOTA/ES           |
    |                              |  |   INTERNATIONAL OCCULTATION  |
    |     EUROPEAN  ASTEROIDAL     |  |      TIMING  ASSOCIATION     |
    |     OCCULTATION NETWORK      |  |       EUROPEAN SECTION       |
    +------------------------------+  +------------------------------+

1 DATE:                  2016 March 31 03:38:41  (UTC)

  STAR:                  USNO-B1.0: 0792-0329102 Mv: 13.8 mag
  ASTEROID:              (404) Arsinoe	 	 Mv: 12.8 mag  (diam. 97.71 km)

2 OBSERVER: 
  Name:                  Jonas SCHENKER / Abbr: Schenker J Observatory
  E-mail:                jonas.schenker@sunrise.ch
  Address:               Ruetiweg 6, CH-5036 Oberentfelden, Switzerland

3 OBSERVING STATION: 
  Nearest city:          5000 Aarau, Switzerland
  Station:               Sternwarte Schafmatt (IAU Observatory Code: B77)
  Latitude:              N 47° 25' 12.88" (WGS84)
  Longitude:             E 07° 57' 02.95" (WGS84)
  Altitude:              820 m (MSL)      (WGS84)

  Predicted observation: yes (located 37 km south of center line)
  Probability:           57.2%
  
  Single station:        Jonas SCHENKER

                         +----------------------------------+
4 TIMING OF EVENT:       |                                  |
                         |  OCCULTATION RECORDED: POSITIVE  |
                         |                                  |
                         +----------------------------------+
  Type of event:
  S = Start observation  I = Interrupt-start   D = Disappearance
  B = Blink              F = Flash             E = End observation
  I = Interrupt-end      R = Reappearance      
  M = Mid-event          P = Predicted time

  Event  Time (UTC)      Acc.      Comments
  Code   HH MM SS.sss    S.sss
  
  S    03 37 39.378      0.040 s : Start observation (UTC)
  D    03 38 38.617      0.040 s : Disappearance     (UTC)      
  R    03 38 48.377      0.040 s : Reappearance      (UTC)     
  E    03 40 12.616      0.040 s : End observation   (UTC)

  Duration:              9.760 s (predicted: max. 13.2 s) 

  M    03 38 43.497 	 0.040 s : Mid-event         (UTC)
  P    03 38 41.000	 8.000 s : Predicted time    (UTC)
        
5 TELESCOPE: 
  Type:                  Cassegrain Astrograph (LOMO / P. Keller)
  Aperture:              450 mm      
  Focal length:          1500 mm f/3.3 (primary focus) 
  Magnification:         focal (resulting field of view: 14.8' x 11.8')
  Mount:                 equatorial
  Motor drive:           yes

6 TIMING & RECORDING:
  Time source:           GPS Garmin 18xLVC-5m
  Sensor:                1/2" Watec 910HX-RC (CCIR) (6.47 x 4.83 mm)
                         752 x 582 px (8.6 x 8.3 my) 
  Frame Grabber:         Hauppauge Analog Video Digitizer USB-Live 2
  Time  insertion:       Video Time Inserter AME TIM-10 with GPS
                         Video frame time: Vt

7 OBSERVING CONDITIONS:
  Atmospheric transp.:   fair (31° above horizon)
  Wind:                  3.3  m/s
  Temperature:           +10  °C
  Relative humidity:      78  %
  Star image stability:  fair (31° above horizon)
  Minor planet visible:  yes   (Mv: 12.8 mag)

8 ADDITIONAL COMMENTS:    
  Shutter mode:               x2
   Integration time (It) =    0.040 s
   Correction time  (Ct) =   -0.040 s (evaluation in frames)
   Tolerance value       = +/-0.020 s (evaluation in frames)
   Reported event time   =    Vt + Ct (correction time applied) 
  Video editing software:     VirtualDub v1.10.4
  Light measurement tool:     Tangra v3.0.91

9 CREDITS:
  Sepp Kaeser for helpful assistance.