ASTEROIDAL OCCULTATION - REPORT FORM REPORTED to SODIS +------------------------------+ +------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +------------------------------+ 1 DATE: 3 January 2024 STAR: UCAC4 597_023753 ASTEROID: Hecuba N?: 108 2 OBSERVER: Name: Tim HAYMES E-mail: Address: 3 OBSERVING STATION: Nearest city: OXFORD, UK Station : Southside Observatory Y98 Latitude : N 51 55 xx Longitude: W 01 18 xx 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 S - 2149:00 - - : - - - : D - 21 49 53.5 +/- 0.15 updated 7/1/23 R - 21 49 57.2 +/- 0.3 - - - : E - 2150:30 - - : Duration : 3.7 +/- 0.3 Mid-event : 21 49 55.4 5 TELESCOPE: Type: C11 Aperture: 280mm Magnification: F/6 Mount:EQ8 Pro Motor drive: Yes 6 TIMING & RECORDING: Exposure : 0.2s Signal/noise: 2.9 Time source: GPS++ Sensor: QHY174-GPS (5.86x5.86u), Global Shutter Recording: SER (2x2bin), SharpCap v4.0.9478, HP i5 SSD W10. Time insertion (specify): 1 PPS (@ start of frame) Event insertion (specify): Tangra and AOTA analysis 7 OBSERVING CONDITIONS: Atmospheric transparency: thin cloud Wind: 1 Temperature: +6C Star image stability: good Minor planet visible? : Yes 8 ADDITIONAL COMMENTS: Observed through thin cloud. Stars were dimmed conciderably 30sec afterwards. Recording stopped early. Optimum extraction photometry was used (tangra) and normalised to a nearby star. The occultation is near the end of the recording. Plate scale : 1.5 arcsec/pix (binned) Predicted Time : 03 Jan; 21:49:55 UT +/- 2 sec Combined Mag : 12.5 Predicted drop : 0.3 Max. Duration : 6 sec OW Centre Dist.: 19 km OW Probability : 100.0% Shadow Width : 83 km Alt/Az : 63° @139° Moon Alt : -22° Constellation : Auriga more CAMERA SETTINGS USB Traffic = 0 Gain : 360 Offset : 100 Gamma : 1 CCD Temporature: -10 C