ASTEROIDAL OCCULTATION - REPORT FORM +------------------------------+ +------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +------------------------------+ +------------------------------+ 1 DATE: 28 October 2016 STAR: 4U 348-191323 ASTEROID: Iguassu N?: 1684 2 OBSERVER: Name: Lars Hermansson Abbr: E-mail: lars.hermansson4@comhem.se Address: Linnégatan 5A, SE-75332 Uppsala, Sweden 3 OBSERVING STATION: Nearest city: Uppsala Station: Sandvreten Observatory Latitude: N 59 48 19.2 Longitude: E 17 12 33.5 Altitude: 40 m (MSL) Datum (WGS84 preferred): WGS84 Single station +----------------------------------+ 4 TIMING OF EVENTS: | | | OCCULTATION RECORDED:POSITIVE | | | +----------------------------------+ Type of event Start observation Interrupt-start Disappearance Blink Flash End observation Jnterrupt-end Reappearance Other (specify) Comments Event Time (UT) P.E. Acc. Code HH MM SS.ss S.ss S.ss S - 18 23 59.57 - - 0.02 : - - - : D - 18 23 12.96 - - 0.05 : R - 18 23 14.50 - - 0.05 : - - - : E - 18 23 59.57 - - 0.02 : Duration : 1.54 +/- 0.02 Mid-event : 18 23 13.73 +/- 0.04 (UT) 5 TELESCOPE: Type: RC Aperture: 406 mm Magnification: Prime focus f/9 Mount: Eq. Fork Motor drive: Yes 6 TIMING & RECORDING: Time source: Local stratum 1 NTP server based on Garmin GPS with pps Sensor: SBIG STL-6303E, 2x2 bin, 1.01"/pix Recording: Drift scan 60 sec, shutter latency corrected, Maxim DL5 Time insertion (specify): Start of trail Event insertion (specify): 7 OBSERVING CONDITIONS: Atmospheric transparency: Good Wind: Moderate Temperature: +5 C Star image stability: Poor Minor planet visible: No 8 ADDITIONAL COMMENTS: Predictions from OccultWatcher: max duration 2.0 sec at 18:23:25 UT, error in time 4 sec, combined magnitude 11.8, predicted mag drop 4.7, rank 36, probability 4.8 %. Analysis with Scanalyzer (v. 2008.8). Coobserver: Mats Johansson