ASTEROIDAL OCCULTATION - REPORT FORM +----------------------------------------+ +----------------------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +----------------------------------------+ +----------------------------------------------+ 1 DATE: 2021 May 24 STAR : UCAC4 361-167169 ASTEROID: (16921) 1998 FZ52 2 OBSERVER: Name: Gérard VAUDESCAL Abbr:VDC E-mail: gg.vaudescal@free.fr Address: 65380 Azereix - France 3 OBSERVING STATION: Nearest city: AZEREIX (65380) Station: Observatoire d'Azereix Latitude: N 43 12 36.0 (WGS84) Longitude: W 00 00 46.5 (WGS84) Altitude: 340 m Single, OR Double or Multiple station (Specify observer's name): Single +---------------------------------------------------+ 4 TIMING OF EVENTS: | | | OCCULTATION RECORDED: NEGATIVE | | | +---------------------------------------------------+ Type of event Start observation Interrupt-start Disappearance Blink Flash End observation Jnterrupt-end Reappearance Other (specify) Event Time (UT) Acc. Comments Code HH MM SS.ss S.ss S - 1:39:53.38 on frame n°7 D - +/- R - +/- E - 1:42:09.66 on frame n°279 Duration : sec xxxx +/- Mid-event: xxxxx (Pédicted 1:40:58 +/- 8.8 sec UT) Was your reaction time applied to the above timings? NO 5 TELESCOPE: Type: Ritchey Chrétien RC10 - Aperture: 254 mm - Magnification: Focus 1340mm - F/D=5.27 Mount: Equatorial - Motor drive: YES 6 TIMING & RECORDING: Time source: GPS 1 PPS-NMEA Sensor: CAMERA ASI178MM - Binning x2 - Exposition : 0,5 sec/f => 2 fps Gamma na - Gain 510/510 - Black 543/600 Recording: Genika 10bits - format SER Time insertion: module GPS_DCD_Time (Genika)-Synchronisation times UTC/frames with module SER Toolbox (Génika) Event insertion (specify): PC-Windows10 7 OBSERVING CONDITIONS: SKY: Clear Cloud : 0 Wind: 0 ms Temperature: 12 °C Star image stability: seeing 2 arcsec Minor planet visible: No 8 ADDITIONAL COMMENTS: Reduction under TANGRA 3.7.3 Rev 20200512 Predicted Max Duration: 2.3sec Predicted Magnitude Drop: 4.9 mag No corrections applied / the test results show a variation of +/- 10ms whatever the exposure times between 20 and 700ms