ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE:                  2022 Mar 20, 21:54 (UTC)

  STAR:                  UCAC4 558-011060      mv: 15.7 mag
  ASTEROID:              (147) Protogeneia     mv: 14.8 mag  (diam. 133.0 km)
                         combined magnitude:   mv: 14.4 mag
                         delta-magnitude:      mv:  0.4 mag

2 OBSERVER:
  Name:                  Peter Englmaier
  E-mail:                peter@englmaier.ch
  Address:               Furttalstrasse 97, 8046 Zurich, Switzerland

3 OBSERVING STATION:
  Nearest city:          Zurich
  Station:               Private Observatory
  Latitude:              N47 25' 21.144" (WGS84)
  Longitude:             E08 29' 42.932" (WGS84)
  Altitude:              467 m (MSL)  (WGS84)
  Single station:        yes

  Predicted observation: yes (Distance 35.8 km from C.L.)
                         Probability: 99.0 percent


                         +----------------------------------+
4 TIMING OF EVENT:       |                                  |
                         |  OCCULTATION RECORDED: UNCERTAIN |
                         |                                  |
                         +----------------------------------+
  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     21 54 12.220    +/-  0.001 s  : Start observation (UTC)
   D     21 54 41.738    +/-  *     s  : Disappearance     (UTC)
   R     21 54 44.239    +/-  *     s  : Reappearance      (UTC)
   E     21 55 12.752    +/-  0.001 s  : End observation   (UTC)

   Duration:    2.501    +/-  *     s  : (predicted: max. 5.4 s)
   M     21 54 42.989    +/-  *     s  : 
   P     21 54 43.000    +/-  1.000 s  : Predicted time    (UTC)

 * Accurancy with confidence intervals from PyOTE: 

magDrop: 1.009  +/- 0.670  (0.95 ci)
snr: 2.49

D time: [21:54:41.7380]
D: 0.6800 containment intervals:  {+/- 0.2662} seconds
D: 0.9500 containment intervals:  {+/- 0.9772} seconds
D: 0.9973 containment intervals:  {+/- 2.5512} seconds

R time: [21:54:44.2390]
R: 0.6800 containment intervals:  {+/- 0.2662} seconds
R: 0.9500 containment intervals:  {+/- 0.9772} seconds
R: 0.9973 containment intervals:  {+/- 2.5512} seconds

Duration (R - D): 2.5010 seconds
Duration: 0.6800 containment intervals:  {+/- 0.4473} seconds
Duration: 0.9500 containment intervals:  {+/- 1.3888} seconds
Duration: 0.9973 containment intervals:  {+/- 3.0252} seconds


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 5 m
  Camera/Sensor:         Digital Camera with integrated GPS-VTI (DVTI CAM Prototype V3, serial #25)
                         Image Sensor Sony IMX174LLJ-C (1/1.2" 1920x1200 5.86um CIS)
                         Website of the project: https://groups.io/g/d-vti-cam/
  Settings:              480x300, Exposure time 500 ms, Gain +31 dB D, Binning 4x4, Format ADV 16-bit
                         without Dark Frame but correction algorithm "Fixed pattern noise red." applied
  Time insertion:        Digital GNSS timestamp into image sensor data stream

7 OBSERVING CONDITIONS:
  Atmospheric transp.:   fair
  Moon:                  92 percent lit, distance 141 deg
  Wind:                  no
  Star image stability:  very poor, due to low altitude
  Altitude of star:      20 deg
  Azimut of star:        281 deg in Taurus

8 ADDITIONAL COMMENTS:
  Feed:                      IBEROC Events
  Video recording software:  DVTI Cam Control v5.0.0-0
  Light measurement tool:    PyMovie v3.3.1 and PyOTE v4.4.5
  Remarks:                   Analysis in PyMovie with mask threshold of 1 sigma above background.

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