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)
                         delta-magnitude:      mv:  0.26 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, 9 km N to C.L.)
                         Probability: 100%

  Single station:        Stefan MEISTER

                         +----------------------------------+
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 31.273    +/-  0.001 s  : Start observation (UTC)
   D     02 11 09.990*   +/-  0.210 s  : Disappearance     (UTC)
   R     02 11 23.810*   +/-  0.240 s  : Reappearance      (UTC)
   E     02 12 02.883    +/-  0.001 s  : End observation   (UTC)

   Duration:   13.820    +/-  0.240 s  : (predicted: max. 14.2s)
   
   M     02 11 16.900    +/-  0.240 s  : Mid-event         (UTC)   
   P     02 11 12        +/-  3.00  s  : Predicted time    (UTC)

        
5 TELESCOPE: 
  Type:                  Newton Reflector f/5
  Aperture:              500 mm
  Focal length:          2500 mm
  Magnification:         focal (resulting field of view: 15.5' in x-axis)
  Mount:                 equatorial
  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 50ms (20 fps), Gain +5dB, Format SER 16 Bit
                         no Dark Frame substracted, new correction algorithm "Fixed pattern noise
                         reduction" applied
  Time insertion:        within Camera, visual and digital timestamp
  Corrections*:          50ms from AOTA result deducted, since Tangra is adding a correction to the SER
                         time, which is representing then the end instead the start time of each frame
                         (known issue with SER files)
  
7 OBSERVING CONDITIONS:
  Atmospheric transp.:   good
  Moon:                  85% @ 37° distance
  Wind:                  no
  Star image stability:  good 
  Altitude of star:      32°
  Azimut of star:        246° in Monoceros

8 ADDITIONAL COMMENTS:    
  Feed:                      IOTA
  Video recording software:  DvtiCamControl v4.6.2
  Light measurement tool:    Tangra v3.6.19 and AOTA v4.9.5.3
  Remarks:                   -
  
  
  Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)