ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +------------------------------+ 1 DATE: 2021 December 12 STAR: UCAC4 607-044741 ASTEROID: (40429) 1999 RL27 2 OBSERVER: Name: Yves Argentin Abbr: E-mail: yves.argentin@obs-mip.fr Address: Camin Deth Biscarmiau 65200 Visker - France 3 OBSERVING STATION: Nearest city: VISKER (65200) Station: Observatoire de Biscarmiau (= Yves A Home) Latitude: N 43 08 40.4 (WGS84) Longitude: E 00 03 31.8 (WGS84) Altitude: 488 m Single, OR Double or Multiple station (Specify observer's name): Single +----------------------------------+ 4 TIMING OF EVENTS: | | | OCCULTATION RECORDED: NEGATIVE | | | +----------------------------------+ Type of event Start observation Interrupt-start Disappearance Blink Flash End observation Jnterrupt-end Reappearance Other (specify) Comments Event Time (UT) P.E. Acc. Code HH:MM:SS.ss S.ss S.ss S - 23:10:15.896 - - - : D - - - : R - - - : - - - : E - 23:11:44.375 Duration : Mid-event: 23:10:58 predicted Was your reaction time applied to the above timings? NO 5 TELESCOPE: Type: NEWTON Aperture: 305 mm Magnification: Focus 1188 mm Mount: Equatorial Motor drive: YES 6 TIMING & RECORDING: Time source: GPS 1 PPS Sensor: CAMERA WATEC 910HX/RC CCIR - integrated Shutter Low x8 (0,16 sec/f) - Gamma: 1 - Gain: 41dB Recording: OccuRec V 3.3.1 Beta and Grabber Lindy USB2 - mode AAV - Intégration rate: x4 Time insertion (specify):IOTA VTI V3 (CCIR) Event insertion (specify): PC-Windows10 7 OBSERVING CONDITIONS: Atmospheric transparency: Good Temperature: 7°C Wind: No Star image stability: ok Minor planet visible: no 8 ADDITIONAL COMMENTS: Probability : 8 % Predicted Max Duration: 1,5 sec Error in Time: +/-6 sec Predicted Combined Magnitude: 13,3 mag Predicted Magnitude Drop: 4,7 mag