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: 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) 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 45.7 km from C.L.) Probability: 94.1 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 21 54 13.117 +/- 0.001 s : Start observation (UTC) D +/- s : Disappearance (UTC) R +/- s : Reappearance (UTC) E 21 55 13.148 +/- 0.001 s : End observation (UTC) Duration: - +/- s : (predicted: max. 5.4 s) P 21 54 43.116 +/- 0.968 s : Predicted time (UTC) 5 TELESCOPE: Type: Newton Reflector f/5 Aperture: 500 mm Focal length: 2500 mm Magnification: focal (resulting field of view: 15.5' in x-axis) Mount: equatorial Motor drive: yes 6 TIMING & RECORDING: Time source: GPS Quality of signal: Accuracy 8 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: 640x400, Exposure time 500 ms, Gain +24 dB, Binning 3x3, 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: 92 percent lit, distance 141 deg Wind: - Star image stability: 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 v5.0.1-0 Light measurement tool: PyMovie v3.3.1 Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)