ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2022 Feb 23, 21:07:27 (UTC) STAR: EDR3 0627356458358636544 mv: 17.1 mag (G) RA = 09 51 09.5943, DE = +19 24 26.019 [ICRF for t0] ASTEROID: (82075) 2000 YW134 mv: 21.4 mag (diam. 390 km) TransNeptunian Object with one satellite, 75km at 1900km delta-magnitude: mv: 4.4 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: no (outside of central path) Probability: 14.0 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 S1 21 01 25.589 +/- 0.001 s : Start observation, main recording (UTC) D +/- s : Disappearance (UTC) R +/- s : Reappearance (UTC) E1 21 13 28.874 +/- 0.001 s : End observation, main recording (UTC) S2 21 13 40.867 +/- 0.001 s : Start observation, 2nd recording (UTC) D +/- s : Disappearance (UTC) R +/- s : Reappearance (UTC) E2 21 22 20.353 +/- 0.001 s : End observation, 2nd recording (UTC) Duration: - +/- s : (predicted: max. 15.5 s) P 21 07 27 +/- 50 s : Predicted time (UTC), Central Occultation time [t0] P 21 09 30 : Estimation for observing location 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 2 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 4000 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.: good, thin cirrus clouds coming up Moon: below horizon Wind: - Star image stability: fair Altitude of star: 53 deg Azimut of star: 130 deg in Leo 8 ADDITIONAL COMMENTS: Feed: From predictions on https://astro.kretlow.de/?StOcc (dbase: CeTNO) Video recording software: DVTI Cam Control v5.0.0-0 Light measurement tool: PyMovie v3.3.1 Further details to the event Speed of the shadow : 25.2 km/s Cross-track uncertainty : 24.7 mas = 816 km = 2.09 path-width (1-sig) RUWE and duplicate source : 1.09 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL-Horizon (2022-01-18) Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list) and data uploaded into the Tubitak portal https://occultation.tug.tubitak.gov.tr/