ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +-------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +-------------------------------+ 1 DATE: 2018 April 21, 00:31 (UTC) STAR: TYC: 0408-00029-1 mv: 11.6 mag ASTEROID: (130) Elektra mv: 12.9 mag (diam. 180.6 km) combined magnitude: mv: 11.3 mag delta-magnitude: mv: 1.59 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) Latitude: N 47 31 10.4 (WGS84) Longitude: E 08 34 14.3 (WGS84) Altitude: 550 m (MSL) (WGS84) Predicted observation: no (located outside of predicted path) 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 00 30 47.35 +/-0.020 s : Start observation (UTC) D 00 31 48.77 +/-0.020 s : Disappearance (UTC) R 00 31 55.03 +/-0.020 s : Reappearance (UTC) E 00 32 49.15 +/-0.020 s : End observation (UTC) Duration: 6.26 s +/-0.020 s : (predicted: max. 20.5 s) M 00 31 51.90 +/-0.020 s : Mid-event (UTC) P 00 31 45 +/-3.000 s : Predicted time (UTC) 5 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: 7.7' x 7.7') Mount: equatorial (10micron GM4000) Motor drive: yes 6 TIMING & RECORDING: Time source: GPS Sensor: 1/2" Watec 902H2 Ultimate (CCIR) Frame Grabber: Terratec G1 Time insertion: IOTA-VTI v2 7 OBSERVING CONDITIONS: Atmospheric transp.: clear Wind: no Star image stability: fair Minor planet visible: no (fainter than occulted star) 8 ADDITIONAL COMMENTS: Video recording software: VirtualDub v1.10.4 Light measurement tool: Tangra v3.6.15 Published by e-mail to planoccult@ls.vvs.be (Planoccult mailing list)