ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE:                  2020 Jun 22, 23:08 (UTC)

  STAR:                  UCAC4 561-089839      mv: 11.5 mag
  ASTEROID:              (2) Pallas            mv:  9.6 mag  (diam. 545 km)
                         combined magnitude:   mv:  9.4 mag
                         delta-magnitude:      mv:  0.17 mag

2 OBSERVER: 
  Name:                  Stefan MEISTER
  E-mail:                meister@dolphins.ch
  Address:               Sandgruebstr. 9, CH-8193 Eglisau, Switzerland

3 OBSERVING STATION: 
  Nearest city:          Buelach, Switzerland
  Station:               Observatory Buelach (MPC Observatory Code: 167)
                         http://www.sternwartebuelach.ch/
  Latitude:              N 47 31 10.4 (WGS84)
  Longitude:             E 08 34 14.3 (WGS84)
  Altitude:              550 m (MSL)  (WGS84)

  Predicted observation: yes (located INSIDE of predicted shadow path, 56 km N to C.L.)
                         Probability: 100%

  Single station:        Stefan MEISTER and Andreas SCHWEIZER

                         +----------------------------------+
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     23 08 12.138    +/-  0.001 s : Start observation (UTC)
   D     23 08 37.470    +/-  0.170 s : Disappearance     (UTC)
   R     23 09 12.580    +/-  0.180 s : Reappearance      (UTC)
   E     23 09 42.158    +/-  0.001 s : End observation   (UTC)

   Duration:   35.110    +/-  0.350 s : (predicted: max. 41.8s)
   
   M     23 08 55.025    +/-  0.175 s : Mid-event         (UTC)      
   P     23 08 57        +/-  2.00 s  : Predicted time    (UTC)

        
5 TELESCOPE: 
  Type:                  Ritchey-Chrétien Reflector (Officina Stellare Pro RC 360)
  Aperture:              360 mm, f/8, 20% obstruction
  Focal length:          2880 mm
  Magnification:         focal (resulting field of view: 13.6' in x-axis)
  Mount:                 equatorial (10micron GM4000 QCI)
  Motor drive:           yes
  
6 TIMING & RECORDING:
  Time source:           GPS
  Quality of signal:     Accurancy 1m
  Camera/Sensor:         Digital Camera with integrated GPS-VTI (Prototype v2b, #8)
                         IMX174LLJ, Pixel size 5.86my, QE ~77% @ 530nm
                         Website of the project: https://groups.io/g/d-vti-cam/
  Settings:              960x600, 2x Binning, Exposure time 100ms (10 fps), Gain +24dB,
                         Digital Video format ADV, 16 Bit, no Dark Frame substracted,
                         no ROIs, correction algorithm "Fixed pattern noise reduction" applied
  Time insertion:        - within Camera, visual and digital GPS timestamp (highly accurate)
                         - Backup with NTP synced PC timestamp (not accurate, just used for comparison purposes)
  
7 OBSERVING CONDITIONS:
  Atmospheric transp.:   good
  Moon:                  below horizont
  Wind:                  no
  Star image stability:  very good
  Altitude of star:      58°
  Azimut of star:        134° in Vulpecula

8 ADDITIONAL COMMENTS:    
  Feed:                      IOTA
  Video recording software:  DvtiCamControl v4.9.10
  Light measurement tool:    Tangra v3.7.3
  Remarks:                   -
  
  
  Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)