ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE:                  2020 September 30,      20:09:31  (UTC)

  STAR:                  UCAC4: 488-093043       mv: 12.40 mag
  ASTEROID:              (2) Pallas              mv: 10.20 mag  (diam. 535 km)
                         combined magnitude:     mv: 10.07 mag
                         delta-magnitude:        mv:  0.13 mag

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:          4204 Himmelried, Switzerland
  Station:               Observatory Himmelried (HIM)
  Latitude:              N 47° 25' 25.11" (WGS84)
  Longitude:             E 07° 34' 42.23" (WGS84)
  Altitude:              536 m (MSL)      (WGS84)

  Predicted observation: yes   (located 199 km East of the predicted center line)
  With of path:          753   km
  Probability:           100.0 %
  
  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)      Accuracy     Comments
  Code   HH MM SS.sss    S.sss
  
   S     20 08 00        +/-0.04 s : Start observation (UTC)
   D     20 09 23.73     +/-0.82 s : Disappearance     (UTC)
   R     20 09 40.07     +/-0.64 s : Reappearance      (UTC)
   E     20 11 00        +/-0.04 s : End observation   (UTC)

   Duration:   16.34 s   +/-1.04 s : (predicted: max. 25.6 s)

   M     20 09 31.90	 +/-1.04 s : Mid-event         (UTC)
   P     20 09 31	 +/-1.00 s : Predicted time    (UTC)
        
5 TELESCOPE: 
  Type:                  Refractor A&M 
  Aperture:              130 mm      
  Focal length:          780 mm f/6
  Magnification:         focal (resulting field of view: 28.5' x 21.3')
  Mount:                 equatorial
  Motor drive:           yes

6 TIMING & RECORDING:
  Time source:           GPS unit: US Global Sat EM-406A (internal)
  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 IOTA-VTI v3 with GPS
			 Video frame time (Vt)

7 OBSERVING CONDITIONS:
  Atmospheric transp.:   fair
  Wind:                  0.0   m/s 
  Temperature:           +12   °C
  Relative humidity:     80    %
  Atmospheric pressure:  1013  hPa
  Moonlight:             yes  (26° above horizon, 78° distant)
  Star image stability:  fair (occulted star 39° above horizon)
  Minor planet visible:  yes  (brightness 10.2 mag)
  
8 ADDITIONAL COMMENTS:    
  Shutter mode:                x4 
  Integration time (It)  =     0.080 s
  Correction time  (Ct)  =    -0.060 s (evaluation in frames)
  Tolerance value        =  +/-0.040 s (evaluation in frames)
  Video frame time       =     Vt
  Reported event time    =     Vt + Ct (correction time applied) 
  Video editing software:      VirtualDub v1.10.4
  Light measurement tool:      Tangra v3.7.3

  No evidence of any satellite was found in the range of -90/+90 seconds.

9 CREDITS:
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