ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE:                  2018 October 14, 20:12 (UTC)

  STAR:                  UCAC4 645-023403      mv: 14.5  mag
  ASTEROID:              (516) Amherstia       mv: 13.9  mag  (diam. 65 km)
                         combined magnitude:   mv: 13.29  mag
                         delta-magnitude:      mv:  0.61 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)
  Latitude:              N 47 31 10.4 (WGS84)
  Longitude:             E 08 34 14.3 (WGS84)
  Altitude:              550 m (MSL)  (WGS84)

  Predicted observation: no (located outside of predicted path)
  
  Single station:        Stefan MEISTER

                         +----------------------------------+
4 TIMING OF EVENT:       |                                  |
                         |  OCCULTATION RECORDED: NEGATIVE  |
                         |                                  |
                         +----------------------------------+
  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    20 12 02.000    1.000 s : Start observation (UTC)
    D    -               0.250 s : Disappearance     (UTC)      
    R    -               0.250 s : Reappearance      (UTC)     
    E    20 13 26.000    1.000 s : End observation   (UTC)

    Duration:                - s   (predicted: max. 10.6 s) 

    M    -               0.250 s : Mid-event         (UTC)
    P    20 12 43       10.000 s : Predicted time    (UTC)

        
5 TELESCOPE: 
  Type:                  TEC 140 f/7 ED Apochromat
  Aperture:              140 mm      
  Focal length:          980 mm 
  Magnification:         focal (resulting field of view: 16.9' in x axis)
  Mount:                 equatorial (10micron GM4000)
  Motor drive:           yes

6 TIMING & RECORDING:
  Time source:           GPS
  Camera/Sensor:         Modified ZW Optical ASI120MM (Digital Camera with new integrated VTI)
  Settings:              1280x960, 2x Binning, Gain 74, Exposure time 0.25s, Output format AVI
  Time insertion:        onboard in Camera, Prototype

7 OBSERVING CONDITIONS:
  Atmospheric transp.:   clear
  Wind:                  no
  Star image stability:  fair
  Minor planet visible:  yes

8 ADDITIONAL COMMENTS:    
  Video recording software:  SharpCap 3.1
  Light measurement tool:    Tangra v3.6.16
  
  Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)