ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE:                  2020 Jan 07, 02:11 (UTC)

  STAR:                  UCAC4 497-025768      mv: 12.0 mag
  ASTEROID:              (69) Hesperia         mv: 10.6 mag  (diam. 138.1 km)
                         combined magnitude:   mv: 10.3 mag
                         delta-magnitude:      mv:  0.26 mag

2 OBSERVER: 
  Name:                  Andreas SCHWEIZER
  E-mail:                aschweiz@mac.com
  Address:               Strumbergaecherstr. 3A, CH-8907 Wettswil, Switzerland

3 OBSERVING STATION: 
  Nearest city:          Wettswil, Switzerland
  Station:
  Latitude:              N 47 20 30.8 (WGS84)
  Longitude:             E 08 28 22.8 (WGS84)
  Altitude:              580 m (MSL)  (WGS84)

  Predicted observation: yes (located INSIDE of predicted shadow path, 30km south of C.L.)
                         Probability: 100%
  
  Single station:        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     02 10 41.551    +/-  0.001 s  : Start observation (UTC)
   D     02 11 12.80     +/-  1.250 s  : Disappearance     (UTC)
   R     02 11 25.55     +/-  1.500 s  : Reappearance      (UTC)
   E     02 13 11.553    +/-  0.001 s  : End observation   (UTC)

   Duration:                 12.75  s  : (predicted: max. 14.2s)
   
   P     02 11 12        +/-  3.00  s  : Predicted time    (UTC)

        
5 TELESCOPE: 
  Type:                  Refractor f/5.6
  Aperture:              107 mm
  Focal length:          600 mm
  Magnification:         focal (resulting field of view: 65.0' in x-axis)
  Mount:                 equatorial
  Motor drive:           yes

6 TIMING & RECORDING:
  Time source:           GPS
  Quality of signal:     Accuracy 16m
  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 1s (1 fps), Gain +24dB, Format SER 16 Bit
  Time insertion:        within Camera, visual and digital timestamp
  Correction:            Added 1 second to AOTA times because the digital timestamp written into the
                         SER file marks the start of the exposure but AOTA interprets it as the end
                         of the exposure. (The end was 1s later at 1fps.)

7 OBSERVING CONDITIONS:
  Atmospheric transp.:   good
  Moon:                  yes, distance 37 degrees
  Wind:                  no
  Star image stability:  good
  Altitude of star:      32 deg SW

8 ADDITIONAL COMMENTS:    
  Feed:                      IOTA
  Video recording software:  DvtiCamControl v4.7.0
  Light measurement tool:    Tangra v3.6.17 and AOTA v4.9.5.3
  Remarks:                   -
  
  Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)