ASTEROIDAL OCCULTATION - REPORT FORM EAON & IOTA/ES 1. DATE: 2022 Apr 29 STAR: TYC 834-01376-1 ASTEROID: (98) Ianthe 2. OBSERVER: Name: Marcin Filipek Abbr: FIM Adress: 32-048 Jerzmanowice, Poland Phone: +48 502 084 115 3. OBSERVING STATION: Jerzmanowice Nearest city: Krakow, Poland Station: Latitude: 50° 12 43.7 N Longitude: 19° 45 02.6 E Altitude: 450 m WGS84, GPS meas 4. TIMING OF EVENTS OCCULTATION RECORDED : P O S I T I V E 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) Event Time (UT) P.E. Acc. Code HH:MM:SS.ss S.ss S.ss S - 19:06:30.00 D - 19:07:36.77 +/- 0.02 s R - 19:07:43.26 +/- 0.01 s E - 19:08:30.00 Duration : 6.49 s +/- 0.03 s Mid-event: 40.02 s +/- 0.02 s 5. TELESCOPE Type: Newton Aperture: 250 mm Focal length: 1000 mm Mount: Equatorial, Sky-Watcher EQ6 Motor drive: Yes 6. TIMING & RECORDING Time source: SNTP (NetTime 3.20 Alpha3) Sensor: ZWO ASI 178MC Recording: exposure 20 ms Recording device: laptop HP, SharpCap 4.0 (Windows10) Time insertion: laptop clock corrected flashing LED GPS-inserter 7. OBSERVING CONDITIONS Atmospheric transparency: good Wind: no Star image stability: good Temperature: 7 deg Celsius Minor planet visible: no Event in altitude: 52° 8. OBSERVATION QUALITY: good 9. ADDITIONAL COMMENTS: Constellation : Leo Distance from center line: 58 km Event probability at site : 58.5 % Star magnitude: 9.9 Asteroid magnitude: 13.0 Predicted mag.drop: 3.2