ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +------------------------------+ 1 DATE: 2015 July 13 22:49:51 (UTC) STAR: USNO-B1.0 0608-0602926 Mv: 13.1 mag ASTEROID: (1285) Julietta Mv: 15.4 mag (diam. 40.83 km) 2 OBSERVER: Name: Jonas SCHENKER / Abbr: Schenker J Observatory E-mail: jonas.schenker@sunrise.ch Address: Ruetiweg 6, CH-5036 Oberentfelden, Switzerland 3 OBSERVING STATION: Nearest city: 5000 Aarau, Switzerland Station: Sternwarte Schafmatt (IAU Observatory Code: B77) Latitude: N 47° 25' 12.88" (WGS84) Longitude: E 07° 57' 02.95" (WGS84) Altitude: 820 m (MSL) (WGS84) Distance: 10.4 km NE of center line Predicted observation: yes Probability: 19.5% Single station: Jonas SCHENKER +----------------------------------+ 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 48 35.299 0.020 s : Start observation (UTC) D -- -- --.--- : Disappearance (UTC) -> miss! R -- -- --.--- : Reappearance (UTC) -> miss! E 22 52 00.297 0.020 s : End observation (UTC) Duration: -.--- s (predicted: max. 4.2 s) -> miss! M -- -- --.--- 0.020 s : Mid-event (UTC) -> miss! P 22 49 51.000 8.000 s : Predicted time (UTC) 5 TELESCOPE: Type: Cassegrain Astrograph (LOMO / P. Keller) Aperture: 450 mm Focal length: 1500 mm f/3.3 (primary focus) Magnification: focal (resulting field of view: 14.8' x 11.8') Mount: equatorial Motor drive: yes 6 TIMING & RECORDING: Time source: GPS Garmin 18xLVC-5m Sensor: 1/2" Watec 910HX-RC (CCIR) (6.47 x 4.83 mm) 752 x 582 px (8.6 x 8.3 my) Frame Grabber: Hauppauge Analog Video Digitizer USB-Live 2 Time insertion: Video Time Inserter AME TIM-10 with GPS Video frame time: Vt 7 OBSERVING CONDITIONS: Atmospheric transp.: poor (12° above horizon) Wind: 2.0 m/s Temperature: +18 °C Relative humidity: 66 % Star image stability: poor (12° above horizon) Minor planet visible: no (Mv: 15.4 mag) 8 ADDITIONAL COMMENTS: Shutter mode: 1/50 s Integration time (It) = 0.020 s Correction time (Ct) = -0.020 s (evaluation in frames) Tolerance value = +/-0.020 s (evaluation in frames) Reported event time = Vt + Ct (correction time applied) Video editing software: VirtualDub Light measurement tool: Limovie 9 CREDITS: Sepp Kaeser for helpful assistance.