ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE:                  2018 December 24, 23:38 (UTC)

  STAR:                  UCAC4 548-017385      mv: 13.70 mag
  ASTEROID:              (1004) Belopolskya    mv: 14.70 mag  (diam. 71.6 km)
                         combined magnitude:   mv: 13.34 mag
                         delta-magnitude:      mv:  1.36 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, 62 km S of center line)
  
  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     23 38 03.85     ±0.500 s : Start observation (UTC)
   D     23 38 44.08     ±0.500 s : Disappearance     (UTC)
   R     23 38 47.61     ±0.500 s : Reappearance      (UTC)
   E     23 39 29.26     ±0.500 s : End observation   (UTC)

   Duration:    3.53 s   ±0.500 s : (predicted: max. 5.8 s)

   M     23 38 45.85 	 ±0.500 s : Mid-event         (UTC)
   P     23 38 40        ±4.000 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: 39.7' in x-axis)
  Mount:                 equatorial (10micron GM4000)
  Motor drive:           yes

6 TIMING & RECORDING:
  Time source:           NTP
  Camera/Sensor:         ZW Optical ASI174MM
  Settings:              800x600, 2x Binning, Gain 377, Exp. time 0.5s, Temp. 6.3°C, Output format SER
  Time insertion:        Time stamp

7 OBSERVING CONDITIONS:
  Atmospheric transp.:   good
  Moon:                  Moonlight (93% in 39° distance)
  Wind:                  no
  Star image stability:  fair
  Minor planet visible:  yes

8 ADDITIONAL COMMENTS:    
  Feed:                      IBEROC
  Video recording software:  SharpCap 3.1
  Light measurement tool:    Tangra v3.6
  Comparison Stars:          3UC219-034635 (11.93m), 3UC220-035363 (12.67m), 3UC220-035444 (14.20m)