ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2021 Jul 05, 23:51 (UTC) STAR: UCAC4 324-138657 mv: 12.6 mag ASTEROID: (2978) Roudebush mv: 16.3 mag (diam. 19.0 km) combined magnitude: mv: 12.6 mag delta-magnitude: mv: 3.7 mag 2 OBSERVER: Name: Andreas SCHWEIZER E-mail: aschweiz@mac.com Address: Strumbergächerstr. 3A, 8907 Wettswil, Switzerland 3 OBSERVING STATION: Nearest city: Bülach Station: Sternwarte Bülach Latitude: N47 31' 10.402" (WGS84) Longitude: E08 34' 14.300" (WGS84) Altitude: 550 m (MSL) (WGS84) Predicted observation: yes (Distance 1.1 km from C.L.) Probability: 83.7 percent Single station: yes +----------------------------------+ 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 23 51 19.821 +/- 0.001 s : Start observation (UTC) D 23 51 48.090 +/- *1) s : Disappearance (UTC) R 23 51 48.592 +/- *2) s : Reappearance (UTC) E 23 52 15.457 +/- 0.001 s : End observation (UTC) Duration: 0.502 +/- *3) s : (predicted: max. 1.7 s) P 23 51 50.081 +/- 1.825 s : Predicted time (UTC) *1) D time: [23:51:48.0900] D: 0.6800 confidence intervals: {+/- 0.0311} seconds D: 0.9500 confidence intervals: {+/- 0.0803} seconds D: 0.9973 confidence intervals: {+/- 0.1942} seconds *2) R time: [23:51:48.5920] R: 0.6800 confidence intervals: {+/- 0.0311} seconds R: 0.9500 confidence intervals: {+/- 0.0803} seconds R: 0.9973 confidence intervals: {+/- 0.1942} seconds *3) Duration (R - D): 0.5020 seconds Duration: 0.6800 confidence intervals: {+/- 0.0478} seconds Duration: 0.9500 confidence intervals: {+/- 0.1097} seconds Duration: 0.9973 confidence intervals: {+/- 0.2391} seconds 5 TELESCOPE: Type: Newton 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 2 m Camera/Sensor: Digital Camera with integrated GPS-VTI (DVTI CAM Prototype V3, serial #20) Image Sensor Sony IMX174LLJ-C (1/1.2" 1920x1200 5.86um CIS) Website of the project: https://groups.io/g/d-vti-cam/ Settings: 960x600, Exposure time 100 ms, Gain +24 dB, Binning 2x2, Format ADV 16-bit Time insertion: Digital GNSS timestamp into image sensor data stream 7 OBSERVING CONDITIONS: Atmospheric transp.: good Moon: below horizon Wind: no Star image stability: fair Altitude of star: 16 deg Azimut of star: 195 deg in Sagittarius 8 ADDITIONAL COMMENTS: Feed: IBEROC Video recording software: DVTI Cam Control v5.0.0-0 Light measurement tool: PyMovie 2.9.7, PyOTE 3.7.4 Remarks: Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)