ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2022 Mar 20, 21:14 (UTC) STAR: UCAC4 527-007091 mv: 11.9 mag ASTEROID: (26491) 2000 BT3 mv: 19.8 mag (diam. 11.0 km) combined magnitude: mv: 11.9 mag delta-magnitude: mv: 7.9 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: no (Distance 19.8 km from C.L.) Probability: 11.5 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 21 14 01.996 +/- 0.001 s : Start observation (UTC) D 21 14 32.014 +/- 0.100 s : Disappearance (UTC) R 21 14 32.213 +/- 0.100 s : Reappearance (UTC) E 21 15 02.229 +/- 0.001 s : End observation (UTC) Duration: 0.200 +/- 0.100 s : (predicted: max. 0.3 s) M 21 14 32.114 +/- 0.100 s : Mid-event (UTC) P 21 14 32.400 +/- 1.054 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 6 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 200 ms, Gain +20 dB, Binning 3x3, 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 154 deg Wind: - Star image stability: fair Altitude of star: 13 deg Azimut of star: 278 deg in Taurus 8 ADDITIONAL COMMENTS: Feed: ITALOccult Events Video recording software: DVTI Cam Control v5.0.1-0 Light measurement tool: PyMovie v3.3.1 and PYOTE v4.2.1 Remarks: Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)