ASTEROIDAL OCCULTATION - REPORT FORM REPORTED to SODIS +------------------------------+ +------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +------------------------------+ 1 DATE: 23 February 2024 STAR: TYC 1297_00218_1 ASTEROID: Ianwong N?: 65244 2 OBSERVER: Name: Tim HAYMES E-mail: Address: 3 OBSERVING STATION: Nearest city: OXFORD, UK Station : Southside Observatory, mpc code Y98 Latitude : N 51 55 xxx Longitude: W 01 18 xxx Altitude : 122m Datum (WGS84 preferred): WGS84 Single, OR Double or Multiple station (Specify observer's name): Single +----------------------------------+ 4 TIMING OF EVENTS: | | | OCCULTATION RECORDED: POSITIVE | | | +----------------------------------+ 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 PYoTE fresnel S - 2041:00 - - : - - - : D - 2041 53.46 +/- 0.03 (ca50%) 2041: 53.612 (-0.025 = 53.59 R - 2041 58.10 +/- 0.03 (50%) 2041: 58.108 = 58.08) - - - : E - 2043:00 - - : Duration : 4.64 4.50 Mid-event : 2041 55.78s 5 TELESCOPE: Type: C11 Aperture: 280mm Magnification: F/6 Mount:EQ8 Pro Motor drive: Yes 6 TIMING & RECORDING: Exposure : 0.05s Signal/noise: 25 Time source: GPS++ Sensor: QHY174-GPS (5.86x5.86u), Global Shutter Recording: ADV(2x2bin), SharpCap v4.1.11786, HP i5 SSD W10. Time insertion (specify): 1 PPS (@ start of frame) Event insertion (specify): Tangra and AOTA analysis 7 OBSERVING CONDITIONS: Atmospheric transparency: Clear Wind: 1 Bf Temperature: +1 C Star image stability: good Minor planet visible? : No 8 ADDITIONAL COMMENTS: Clear conditions between moving high cloud. No other observers in the path. D/R were clearly non-instantaneous at 20 fps. Long event in Full Moon light. Star bright. Asteroid was magnitude 20 Fresnel effects observed. Plate scale : 1.4 arcsec/pix (binned) Predicted Time : 23 Feb; 20:41:55 UT +/- 6 sec Combined Mag : 9.7 Predicted drop : 10.6 Max. Duration : 4 sec OW Centre Dist.: 1 km OW Probability : 32.2% Shadow Width : 15 km Alt/Az : 51° @210° Moon Alt : 37° Constellation : Taurus more CAMERA SETTINGS USB Traffic = 0 Gain : 310 Offset : 100 Gamma : 1 CCD Temporature: -10 C