ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2020 Sep 30, 20:09 (UTC) STAR: UCAC4 488-093043 mv: 12.4 mag ASTEROID: (2) Pallas mv: 10.2 mag (diam. 535.0 km) combined magnitude: mv: 10.1 mag delta-magnitude: mv: 0.1 mag 2 OBSERVER: Name: Stefan Meister and Andreas Schweizer 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) http://www.sternwartebuelach.ch/ Latitude: N47 31' 10.402" (WGS84) Longitude: E08 34' 14.300" (WGS84) Altitude: 550 m (MSL) (WGS84) Single station: yes Predicted observation: yes (Distance 191.5 km from C.L.) Probability: 100.0 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 20 08 46.739 +/- 0.001 s : Start observation (UTC) D 20 09 26.521 see below : Disappearance (UTC) R 20 09 38.124 see below : Reappearance (UTC) E 20 10 16.901 +/- 0.001 s : End observation (UTC) Duration: 11.603 see below : (predicted: max. 25.6 s) M 20 09 32.322 see below : Mid-event (UTC) P 20 09 31.527 +/- 0.878 s : Predicted time (UTC) Accurancy with confidence intervals from PyOTE: nominal magDrop: 0.11 snr: 0.49 D: 0.6800 confidence intervals: {+/- 0.5418} seconds D: 0.9500 confidence intervals: {+/- 1.9458} seconds D: 0.9973 confidence intervals: {+/- 4.7807} seconds R: 0.6800 confidence intervals: {+/- 0.5418} seconds R: 0.9500 confidence intervals: {+/- 1.9458} seconds R: 0.9973 confidence intervals: {+/- 4.7807} seconds Duration: 0.6800 confidence intervals: {+/- 0.8619} seconds Duration: 0.9500 confidence intervals: {+/- 2.5316} seconds Duration: 0.9973 confidence intervals: {+/- 5.5567} seconds 5 TELESCOPE: Type: Cassegrain Reflector f/5 Aperture: 800 mm Focal length: 3900 mm (incl. 0.5x Reducer) Magnification: focal (resulting field of view: 10' in x-axis) Mount: equatorial Motor drive: yes 6 TIMING & RECORDING: Time source: GPS Quality of signal: Accuracy 7m Camera/Sensor: Digital Camera with integrated GPS-VTI (Prototype v3, serial #13) IMX174LLJ, Pixel size 5.86my, QE ~77% @ 530nm Website of the project: https://groups.io/g/d-vti-cam/ Settings: 640x400, Exposure time 50 ms, Gain +20 dB, Binning 3x3, Format ADV 16-bit Dark Frame substracted, no ROIs, correction algorithm "Fixed pattern noise red." Time insertion: Digital GNSS timestamp into image sensor data stream 7 OBSERVING CONDITIONS: Atmospheric transp.: - Moon: 99 percent lit, distance 78 deg Wind: no Star image stability: very good Altitude of star: 39 deg Azimut of star: 231 deg in Aquila 8 ADDITIONAL COMMENTS: Feed: IOTA Updates Video recording software: DVTI Cam Control v4.10.2 Light measurement tool: PyMovie v2.8.4 and PyOTE v3.5.9 Remarks: - Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)