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) combined magnitude: mv: 10.3 mag delta-magnitude: mv: 0.26 mag 2 OBSERVER: Name: Andreas SCHWEIZER E-mail: aschweiz@mac.com Address: Strumbergaecherstr. 3A, CH-8907 Wettswil, Switzerland 3 OBSERVING STATION: Nearest city: Wettswil, Switzerland Station: Latitude: N 47 20 30.8 (WGS84) Longitude: E 08 28 22.8 (WGS84) Altitude: 580 m (MSL) (WGS84) Predicted observation: yes (located INSIDE of predicted shadow path, 30km south of C.L.) Probability: 100% Single station: Andreas SCHWEIZER +----------------------------------+ 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 41.551 +/- 0.001 s : Start observation (UTC) D 02 11 12.80 +/- 1.250 s : Disappearance (UTC) R 02 11 25.55 +/- 1.500 s : Reappearance (UTC) E 02 13 11.553 +/- 0.001 s : End observation (UTC) Duration: 12.75 s : (predicted: max. 14.2s) P 02 11 12 +/- 3.00 s : Predicted time (UTC) 5 TELESCOPE: Type: Refractor f/5.6 Aperture: 107 mm Focal length: 600 mm Magnification: focal (resulting field of view: 65.0' in x-axis) Mount: equatorial Motor drive: yes 6 TIMING & RECORDING: Time source: GPS Quality of signal: Accuracy 16m 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 1s (1 fps), Gain +24dB, Format SER 16 Bit Time insertion: within Camera, visual and digital timestamp Correction: Added 1 second to AOTA times because the digital timestamp written into the SER file marks the start of the exposure but AOTA interprets it as the end of the exposure. (The end was 1s later at 1fps.) 7 OBSERVING CONDITIONS: Atmospheric transp.: good Moon: yes, distance 37 degrees Wind: no Star image stability: good Altitude of star: 32 deg SW 8 ADDITIONAL COMMENTS: Feed: IOTA Video recording software: DvtiCamControl v4.7.0 Light measurement tool: Tangra v3.6.17 and AOTA v4.9.5.3 Remarks: - Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)