ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2020 Jan 07, 02:11 (UTC) STAR: UCAC4 497-025768 mv: 12.0 mag ASTEROID: (69) Hesperia mv: 10.6 mag (diam. 138.1 km) delta-magnitude: mv: 0.26 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 INSIDE of predicted shadow path, 9 km N to C.L.) Probability: 100% 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 02 10 31.273 +/- 0.001 s : Start observation (UTC) D 02 11 09.990* +/- 0.210 s : Disappearance (UTC) R 02 11 23.810* +/- 0.240 s : Reappearance (UTC) E 02 12 02.883 +/- 0.001 s : End observation (UTC) Duration: 13.820 +/- 0.240 s : (predicted: max. 14.2s) M 02 11 16.900 +/- 0.240 s : Mid-event (UTC) P 02 11 12 +/- 3.00 s : Predicted time (UTC) 5 TELESCOPE: Type: Newton Reflector f/5 Aperture: 500 mm 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 1m 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: 960x600, 2x Binning, Exposure time 50ms (20 fps), Gain +5dB, Format SER 16 Bit no Dark Frame substracted, new correction algorithm "Fixed pattern noise reduction" applied Time insertion: within Camera, visual and digital timestamp Corrections*: 50ms from AOTA result deducted, since Tangra is adding a correction to the SER time, which is representing then the end instead the start time of each frame (known issue with SER files) 7 OBSERVING CONDITIONS: Atmospheric transp.: good Moon: 85% @ 37° distance Wind: no Star image stability: good Altitude of star: 32° Azimut of star: 246° in Monoceros 8 ADDITIONAL COMMENTS: Feed: IOTA Video recording software: DvtiCamControl v4.6.2 Light measurement tool: Tangra v3.6.19 and AOTA v4.9.5.3 Remarks: - Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)