ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +------------------------------+ 1 DATE: 2022/08/05 STAR: TYC 4600-01728-1 ASTEROID: (385186) 1994 AW1 2 OBSERVER: Name: Daniel BLAZEWICZ, Nikodem BLAZEWICZ Address: 32-015 Klaj, POLAND 3 OBSERVING STATION: Bobrowniki Male Nearest city: Radlow (Poland) Longitude: E 20 53 49.2 (WGS84) Latitude: N 50 04 01.3 (WGS84) Altitude: 185 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 - 20:54:47 - - : E - 20:55:57 - - : 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: NTP Sensor: ZWO ASI174MM-C Recording: ZWO ASICAP V2.3 Exposure: 10 ms 7 OBSERVING CONDITIONS: Atmospheric transparency: good Wind: no Temperature: 21 deg C Star image stability: good Minor planet visible: no 8 ADDITIONAL COMMENTS: Analyzed using Tangra v3.7.4 S/N of occulted star: 11 - 13 Camera temperature: 0 deg C Personal feed (Horizons JPL#258 2022/08/05, Gaia EDR3): Event time: 20:55:15 UT Error in time: 1.5 s Max duration: 0.13 s Star magnitude: 9.2 m Asteroid magnitude: 17.3 m Combined magnitude: 9.2 m Magnitude drop: 8.1 m Position: At the edge of the shadow path Probability: 4.4 %