ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +------------------------------+ 1 DATE: 2022/04/29 STAR: TYC 834-01376-1 ASTEROID: (98) Ianthe 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 33.0 (WGS84) Altitude: 210 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 - 19:06:01 - - : E - 19:08:41 - - : 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, 1 sigma < 1 ms Sensor: ZWO ASI174MM-C Recording: ZWO ASICAP V2.3 Exposure: 11 ms 7 OBSERVING CONDITIONS: Atmospheric transparency: good Wind: no Temperature: 11 deg C Star image stability: fair Minor planet visible: no 8 ADDITIONAL COMMENTS: Analyzed using Tangra v3.7.4 S/N of occulted star: 9 - 15 (Tangra) ITALOccult feed (2022/04/13): Event time: 19:07:40 UT Error in time: 3 s Max duration: 10.1 s Star magnitude: 9.9 m Asteroid magnitude: 13.0 m Combined magnitude: 9.8 m Magnitude drop: 3.2 m Position: In the 1-sigma zone, 7 km outside the shadow path Probability: 38.4 %