ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2019 February 24, 23:10 (UTC) STAR: UCAC4 403-058355 mv: 14.2 mag ASTEROID: (91775) 1999 TH206 mv: 20.4 mag (diam. 7 km) combined magnitude: mv: 14.2 mag delta-magnitude: mv: 6.2 mag 2 OBSERVER: Name: Stefan MEISTER and Andreas SCHWEIZER 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 path) Single station: Stefan MEISTER and Andreas SCHWEIZER +----------------------------------+ 4 TIMING OF EVENT: | | | OCCULTATION RECORDED: NEGATIVE | | | +----------------------------------+ 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 09 16.987 +/- 0.01s : Start observation (UTC) D - : Disappearance (UTC) R - : Reappearance (UTC) E 23 11 51.434 +/- 0.01s : End observation (UTC) Duration: - s : (predicted: max. 2.6s) M - : Mid-event (UTC) P 23 10 35 +/- 65 s : Predicted time (UTC) 5 TELESCOPE: Type: Newton Reflector f/5 Aperture: 500 mm Focal length: 2500 mm Magnification: focal (resulting field of view: 6.6' in x-axis) Mount: equatorial Motor drive: yes 6 TIMING & RECORDING: Time source: GPS Camera/Sensor: Digital Camera with integrated GPS-VTI (Prototype) AR0130CSSM, Pixel size 3.75my, QE 77% Settings: 320x240, 4x Binning, Exposure time 500ms (2 fps), Gain 10, Output format SER Dark frame substracted Time insertion: within Camera, binary and visual timestamp 7 OBSERVING CONDITIONS: Atmospheric transp.: good Moon: no (just rising) Wind: no Star image stability: good Minor planet visible: no 8 ADDITIONAL COMMENTS: Feed: IBEROC Video recording software: SharpCap 3.1.5220 Light measurement tool: Tangra v3.6 Remarks: Occulted star only 12 degrees above horizon Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)