+--------------------------------+ +--------------------------------+ ASTERIODAL OCCULTATION - REPORT FORM +--------------------------------+ +--------------------------------+ EAON & IOTA-ES EUROPEAN ASTEROIDAL OCCULTATION NETWORK INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION +--------------------------------+ +--------------------------------+ 1. DATE: 15 Jan 2014 STAR: 2UCAC 45489325 ASTEROID: (508) Princetonia 2. OBSERVER Name: Stefano SPOSETTI Address: 6525 GNOSCA - Switzerland Email: stefanosposetti@ticino.com 3. OBSERVING STATION Nearest city: CH-6500 Bellinzona Longitude: 9d 1m 26.5s (E) Latitude: 46d 13m 53.2s (N) Altitude: 260m (WGS84) 4. TIMING OF EVENTS Occultation recorded: POSITIVE Type of event: "S"tart observation; "I"nterrupt-start; "D"isappearance; "B"link; "F"lash; "E"nd observation; "I"nterrupt-end; "R"eappearance; "O"ther (specify) Personal Equation Substracted: No Event Time (UTC) Accuracy + Comments code: HH:MM:SS.ss S.ss -S : 00:34:26 -D : 00:35:05.11 ± 0.16 -R : 00:35:13.75 ± 0.80 -E : 00:35:33 Duration: 8.64s ± 0.96s 5. TELESCOPE Type: Schmidt-Cassegrain, Celestron 11-inch Aperture: 280mm Focal length: 930mm (with focal reducer) Magnification: FOV 23x18arcmin Mount: Equatorial Motor drive: No 6. TIMING & RECORDING Timekeeping: KIWI-OSD with GPS Garmin 18 LVC Sensor/Camera: Videocamera WAT-910HX, CCIR, 1/2", ICX429ALL sensor Videocamera settings: Shutter=x16; Gain=41dB; Gamma=1.00 Device of recording: Personal computer, Imaging Source DFG/SV1 PCI, S-video, Virtualdub software, saved on Harddisk Mode of recording: Integration time=0.320s, CCIR, Huffyuv Time insertion: KIWI-OSD 7. OBSERVING CONDITIONS Atmospheric transparency: good Wind: no Star image stability: good Minor Planet Visible: no 8. ADDITIONAL COMMENTS Automatic observation. The front plate of the telescope went moisty during the recording. The Disappearance time is clearly visible. The Reappearance time is less certain. Tangra was used to plot the lightcurve. Analysis was made manually. A correction of -0.180s (according the table of G. Dangl), because of the use of an integrating camera, was made. The lightcurve is visible here: http://sposetti.ch/images/stories/News/2014_JAN_15_Princetonia_Gnosca.png