ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE:                  2021 Sep 24, 23:18 (UTC)

  STAR:                  UCAC4 382-160757      mv: 12.4 mag
  ASTEROID:              (4050) Mebailey       mv: 17.2 mag  (diam. 16.0 km)
                         combined magnitude:   mv: 12.4 mag
                         delta-magnitude:      mv:  4.8 mag

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

3 OBSERVING STATION:
  Nearest city:          Zurich, Switzerland
  Station:               Private Observatory
  Latitude:              N47.42260   (WGS84)
  Longitude:             E08.49515   (WGS84)
  Altitude:              467 m (MSL) (WGS84)
  Single station:        yes
  
  Predicted observation: yes (Distance 1.2 km from C.L.)
                         Probability: 88.7 percent


                         +----------------------------------+
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     23 18 15.466    +/-  0.001 s  : Start observation (UTC)
   D                     +/-        s  : Disappearance     (UTC)
   R                     +/-        s  : Reappearance      (UTC)
   E     23 19 15.500    +/-  0.001 s  : End observation   (UTC)

   Duration:        -    +/-        s  : (predicted: max. 2.7 s)

   P     23 18 45.979    +/-  4.703 s  : Predicted time    (UTC)

5 TELESCOPE: 
  Type:                  Alluna Ritchey-Chrétien f/8 (RC16)
  Aperture:              405 mm, Obstruction 43%
  Focal length:          3240 mm
  Magnification:         focal (resulting field of view: 11.7' in x-axis)
  Mount:                 equatorial, 10micron GM3000 HPS
  Motor drive:           yes

6 TIMING & RECORDING:
  Time source:           GPS
  Quality of signal:     Accuracy 3 m
  Camera/Sensor:         Digital Camera with integrated GPS-VTI (DVTI CAM Prototype V3, serial #15)
                         Image Sensor Sony IMX174LLJ-C (1/1.2" 1920x1200 5.86um CIS)
                         Website of the project: https://groups.io/g/d-vti-cam/
  Settings:              960x600, Exposure time 200 ms, Gain +20 dB, Binning 2x2, Format ADV 16-bit
                         with Dark Frame and correction algorithm "Fixed pattern noise red." applied
  Time insertion:        Digital GNSS timestamp into image sensor data stream

7 OBSERVING CONDITIONS:
  Atmospheric transp.:   fair
  Moon:                  85 percent lit, distance 83 deg
  Wind:                  no
  Star image stability:  good
  Altitude of star:      22 deg
  Azimut of star:        216 deg in Capricornus

8 ADDITIONAL COMMENTS:
  Feed:                      IBEROC
  Video recording software:  DVTI Cam Control v5.0.0-0
  Light measurement tool:    PyMovie v3.1.6 
  Remarks:

  Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)