ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2020 Jun 24, 23:34 (UTC) STAR: UCAC4 312-236048 mv: 13.4 mag ASTEROID: (121) Hermione mv: 12.2 mag (diam. 209.0 km) delta-magnitude: mv: 0.31 mag 2 OBSERVER: Name: Stefan MEISTER E-mail: meister@dolphins.ch Address: Sandgruebstr. 9, CH-8193 Eglisau, Switzerland 3 OBSERVING STATION: Nearest city: Buelach, Switzerland Station: Observatory Buelach (MPC Observatory Code: 167) http://www.sternwartebuelach.ch/ Latitude: N 47 31 10.4 (WGS84) Longitude: E 08 34 14.3 (WGS84) Altitude: 550 m (MSL) (WGS84) Predicted observation: yes (located OUTSIDE of predicted shadow path, 454 km NW to C.L.) Probability: 35% Single station: Stefan MEISTER +----------------------------------+ 4 TIMING OF EVENT: | | | OCCULTATION RECORDED: POSITIVE | | | +----------------------------------+ Type of event: S = Start observation I = Interrupt-start D = Disappearance B = Blink F = Flash E = End observation I = Interrupt-end R = Reappearance M = Mid-event P = Predicted time Event Time (UTC) Acc. Comments Code HH MM SS.sss S.sss S 23 33 47.214 +/- 0.001 s : Start observation (UTC) D 23 34 27.170 +/- 0.350 s : Disappearance (UTC) R 23 34 35.920 +/- 1.100 s : Reappearance (UTC) E 23 35 17.233 +/- 0.001 s : End observation (UTC) Duration: 8.750 +/- 1.450 s : (predicted: max. 14.3 s) M 23 34 31.545 +/- 0.725 s : Mid-event (UTC) P 23 34 32 +/- 5.0 s : Predicted time (UTC) 5 TELESCOPE: Type: Newton Reflector f/5 Aperture: 500 mm, 4.4% obstruction Focal length: 2500 mm Magnification: focal (resulting field of view: 15.5' in x-axis) Mount: equatorial Motor drive: yes 6 TIMING & RECORDING: Time source: GPS Quality of signal: Accurancy 2m Camera/Sensor: Digital Camera with integrated GPS-VTI (Prototype v2b, #8) IMX174LLJ, Pixel size 5.86my, QE ~77% @ 530nm Website of the project: https://groups.io/g/d-vti-cam/ Settings: 640x400, 3x Binning, Exposure time 200ms (5 fps), Gain +18dB, Digital Video format ADV, 16 Bit, no Dark Frame substracted, no ROIs, correction algorithm "Fixed pattern noise reduction" applied Time insertion: - within Camera, visual and digital GPS timestamp (highly accurate) - Backup with NTP synced PC timestamp (not accurate, just used for comparison purposes) 7 OBSERVING CONDITIONS: Atmospheric transp.: fair Moon: - Wind: no Star image stability: fair Altitude of star: 14° Azimut of star: 171° in Sagittarius 8 ADDITIONAL COMMENTS: Feed: IBEROC Video recording software: DvtiCamControl v4.9.10 Light measurement tool: Tangra v3.7.3 Remarks: - Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)