ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +------------------------------+ 1 DATE: 2021/12/12 STAR: UCAC4 618-047222 ASTEROID: (292) Ludovica 2 OBSERVER: Name: Daniel BLAZEWICZ Address: 32-015 Klaj, POLAND 3 OBSERVING STATION: Klaj Nearest city: Niepolomice (Poland) Longitude: E 20 19 04.2 (WGS84) Latitude: N 49 59 33.2 (WGS84) Altitude: 211 m (MSL) Single station +----------------------------+ 4 TIMING OF EVENTS: | | | EVENT REPORTED: NEGATIVE | | | +----------------------------+ Event code S: observation Start I: Interruption start D: Disappearance J: Interruption end R: Reappearance B: Blink F: Flash E: observation End O: Other (specify) Abbreviations P.E.: Personal Equation = reaction time (for visual obs) Acc.: Accuracy (overall accuracy of the given time) Comments Event Time (UT) P.E. Acc. Code HH:MM:SS.ss S.ss S.ss S - 23:00:44 - - : E - 23:11:54 - - : 5 TELESCOPE: Type: NEWTON Aperture: 350 mm Magnification: prime focus f/4.8 Mount: EQUATORIAL with polar wedge Motor drive: YES 6 TIMING & RECORDING: Time source: "chrony", 4 x NTP Stratum 1, Linux Ubuntu Sensor: ZWO ASI174MM-C Recording: ZWO ASICAP V2.3 Exposure: 700 ms 7 OBSERVING CONDITIONS: Atmospheric transparency: poor Wind: weak Temperature: -4 deg C Star image stability: good Minor planet visible: yes 8 ADDITIONAL COMMENTS: Analyzed using Tangra v3.7.3 S/N of occulted star: 5.5 - 18 (Tangra) Camera temperature: -25 deg C ITALOccult feed (2021/11/11): Event time: 23:05:53 UT Error in time: 4 s Max duration: 4.1 s Star magnitude: 14.6 m Asteroid magnitude: 14.3 - 14.7 m Combined magnitude: 13.7 - 13.9 m Magnitude drop: 0.6 - 0.8 m Position: In the 1-sigma zone, 21 km outside the shadow path Probability: 24.4 %