ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2022 Jan 23, 19:02 (UTC) STAR: UCAC4 499-003044 mv: 12.6 mag ASTEROID: (1352) Wawel mv: 16.3 mag (diam. 20.0 km) combined magnitude: mv: 12.6 mag delta-magnitude: mv: 3.7 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 6.0 km from C.L.) Probability: 81.0 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 19 01 32.487 +/- 0.001 s : Start observation (UTC) D +/- s : Disappearance (UTC) R +/- s : Reappearance (UTC) E 19 02 32.641 +/- 0.001 s : End observation (UTC) Duration: +/- s : (predicted: max. 1.1 s) P 19 02 03.906 +/- 1.791 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 1 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 125 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.: poor (clouds passing by) Moon: below horizon Wind: yes, weak Star image stability: good Altitude of star: 47 deg Azimut of star: 216 deg in Cetus 8 ADDITIONAL COMMENTS: Feed: Planned Observations Video recording software: DVTI Cam Control v5.0.0-0 Light measurement tool: PyMovie v3.3.0 and PYOTE v4.1.2 Remarks: Lightcurve shows fluctuations in brightness of target and ref. stars during recording, due to thin layer of clouds passing by. However the event was clearly negative, although high prob. of 81% and pos. within center path. Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)