ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2019 February 17, 22:46 (UTC) STAR: UCAC4 440-045228 mv: 13.2 mag ASTEROID: (53401) 1999 JT115 mv: 18.3 mag (diam. ? km) combined magnitude: mv: 13.2 mag delta-magnitude: mv: 5.1 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 inside 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 22 45 08.633 +/- 0.01s : Start observation (UTC) D - : Disappearance (UTC) R - : Reappearance (UTC) E 22 46 50.597 +/- 0.01s : End observation (UTC) Duration: - s : (predicted: max. 0.6 s) M - : Mid-event (UTC) P 22 46 28 +/- 6.0 s : Predicted time (UTC) 5a 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 5b TELESCOPE: Type: Ritchey-Chrétien Reflector (Officina Stellare Pro RC 360) Aperture: 360 mm Focal length: 2880 mm f/8 Magnification: focal (resulting field of view: 5.7' in x-axis) Mount: equatorial (10micron GM4000) 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: 424x318, 3x Binning, Exposure time 250ms, Output format SER (@ 5b) Time insertion: within Camera, binary and visual timestamp 7 OBSERVING CONDITIONS: Atmospheric transp.: good Moon: yes, distance 22 degrees Wind: no Star image stability: fair Minor planet visible: no 8 ADDITIONAL COMMENTS: Feed: UKOCL Video recording software: SharpCap 3.1.5220 Light measurement tool: Tangra v3.6 Remarks: Used two different telescopes (at the same location) with two identical cameras as described under 6. Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)