ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +------------------------------+ 1 DATE: 2020 September 02 STAR: UCAC4 570-004391 ASTEROID: (705) Erminia 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: POSITIVE | | | +----------------------------------+ 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 - 23:47:33.84 on frame n°7 D - 23:48:37,96 +/- 0,30 R - 23:48:50,90 +/- 0,30 E - 23:50:00.15 on frame n°249 Duration : sec 12.94" +/-0,42 Mid-event: 23:48:44,43 UT (Pédicted 23:48:45 +/- 6,3sec) Was your reaction time applied to the above timings? NO 5 TELESCOPE: Type: Ritchey Chrétien Aperture: 254 mm Magnification: Focus 1340 mm (réducer x0,67) Mount: Equatorial Motor drive: YES 6 TIMING & RECORDING: Time source: Windows10 / NTP Sensor: CAMERA ASI178MM - Binning x2 - Exposition :0,602sec/f) => 1,664 fps Gamma na - Gain 483/510 Recording: Genika 8bits - mode SER Time insertion: (Genika)-Synchronisation Horloge PC with NTP >> File_Convert-Genika Event insertion (specify): PC-Windows10 7 OBSERVING CONDITIONS: Clear SKY - Wind: 0 ms - Temperature: 9 °C Star image stability: good - seeing 1.3 arcsec - Minor planet visible: Yes 8 ADDITIONAL COMMENTS: Reduction with TANGRA 3.7.3 Rev 20200512 Predicted Max Duration: 13.3 sec Predicted Magnitude Drop: 0.41 mag Corrections applied / test results show a maximum variation of 10ms regardless of exposure times between 20 and 700ms Choice of NTP protocol following a GPS failure