ASTEROIDAL OCCULTATION - REPORT FORM

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

1 DATE:                  2023 Nov 30, 00:53 (UTC)

  STAR:                  UCAC4 490-018092      mv: 13.1 mag
                         Star position (ICRF): 06 03 46.1290 +07 53 48.132
  ASTEROID:              (319) Leona           mv: 14.4 mag  (diam.  61 +/- 3 km)
                         combined magnitude:   mv: 12.8 mag
                         delta-magnitude:      mv:  1.6 mag

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

3 OBSERVING STATION:
  Nearest city:          Windhoek, NAM
  Station:               VdS Remote Observatory, Hakos, Namibia (MPC Obs. Code: M58)
  Latitude:              -23.23660 S  23°14'11.8"S  (WGS84)
  Longitude:              16.36135 E  16°21'40.9"E  (WGS84)
  Altitude:              1827 m (MSL)
  Single station:        yes

  Predicted observation: yes (Distance 12 km from C.L.)
                         Probability: 90 percent

                         +----------------------------------+
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     00 53 07        +/-  1.000 s  : Start observation (UTC)
   E     00 55 07        +/-  1.000 s  : End observation   (UTC)
   P     00 53 40        +/-  1.000 s  : Predicted time    (UTC)
                                         (predicted: max. 7.2 s)
  
  In case of a positive event: see extracted times in the PyOTE report "LC.pyote_log.txt":
 
 magDrop report: percentDrop: 68.9  magDrop: 1.267  +/- 0.102  (0.95 ci)

DNR: 7.47

D time: [00:53:38.2977]
D: 0.6800 containment intervals:  {+/- 0.0287} seconds
D: 0.9500 containment intervals:  {+/- 0.0648} seconds
D: 0.9973 containment intervals:  {+/- 0.1343} seconds

R time: [00:53:45.1421]
R: 0.6800 containment intervals:  {+/- 0.0287} seconds
R: 0.9500 containment intervals:  {+/- 0.0648} seconds
R: 0.9973 containment intervals:  {+/- 0.1343} seconds

Duration (R - D): 6.8444 seconds
Duration: 0.6800 containment intervals:  {+/- 0.0430} seconds
Duration: 0.9500 containment intervals:  {+/- 0.0930} seconds
Duration: 0.9973 containment intervals:  {+/- 0.1697} seconds
 

5 TELESCOPE: 
  Type:                  12" TS-Newton-Astrograph, f/4.56
  Aperture:              304.8 mm
  Focal length:          1391 mm
  Magnification:         focal (resulting field of view: 58' in x-axis)
  Mount:                 10 Micron GM3000 HPS, equatorial
  Motor drive:           yes

6 TIMING & RECORDING:
  Time source:           NTP
  Quality of signal:     unknown
  Camera/Sensor:         Lacerta (ToupTek) DeepSkyPro 2600
                         26 MPixel (IMX571 back-illuminated), Pixel size 3,76 x 3,76µm
                         Sensor size 23.48 x 15.67mm, 6224 x 4168 Pixel
  Settings:              1600x1200, Exposure time 100 ms, Gain 9385, Binning 2x2, Format ADV 8-bit
  Time insertion:        via SharpCap

7 OBSERVING CONDITIONS:
  Moon:                  92.2%, Distance 22.1 deg, Elevation 42.6 deg
  Wind:                  no data
  Temperature:           19 deg C
  Humidity               59%
  Altitude of star:      58.2 deg
  Azimut of star:        346.4 deg

8 ADDITIONAL COMMENTS:
  Feed:                      no Feed, own calculation with Occult v4
  Video recording software:  SharpCap Pro v4.0.9538, 64 bit
                             Video analysed with PyMovie 4.0.2 and PyOTE 5.4.8
  Signal/Noise:              7.47 (DNR)
  Further Comments:          Parallel observation from the IAS Station on Hakos, separate Report to follow
                             Both observed a longer D then R transition time (2-3 frames)
  Known issues:              NTP syncronisation on Hakos was tricky and could lead to an addional error in the timing
                             (high latency on the internet connection).
                             SharpCap could only reach an avg. rate of 4.6 fps, although an USB3 connection was used.