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ASTERIODAL OCCULTATION - REPORT FORM

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EAON & IOTA-ES

EUROPEAN ASTEROIDAL OCCULTATION NETWORK

INTERNATIONAL OCCULTATION TIMING ASSOCIATION EUROPEAN SECTION

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1. DATE: 05 Oct 2016
STAR: 1UT 513-117202
ASTEROID: (1023) Thomana

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: NEGATIVE
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.sss

-S : 00:55:01
-E : 01:12:18

5. TELESCOPE
       Type: Schmidt-Cassegrain, Celestron 11-inch
       Aperture: 280 mm
       Focal length: 930 mm (with focal reducer)
       Magnification: FOV 23x18 arcmin
       Mount: Equatorial
       Motor drive: Yes

6. TIMING & RECORDING
- Sensor/Camera: Videocamera WAT-910HX, CCIR, 1/2", ICX429ALL sensor
- Videocamera settings: Shutter = x16; Gain = 41/41; Gamma = 1.00
- Device of recording: Personal computer, Imaging Source DFG/SV1 PCI, S-video input, CCIR, Huffyuv compression, Virtualdub software
- Timekeeping: IOTA-VTI
- Integration time: 0.320 s

7. OBSERVING CONDITIONS
       Atmospheric transparency: good
       Wind: none
       Star image stability: good/fair
       Minor Planet Visible: -

8. ADDITIONAL COMMENTS

Event predicted by Occultwatcher, IBEROC feed.
Rank: 34.
Probability for my location: 19 %.
Predicted drop of light: 1.4 magR.
Predicted maximal duration: 3.3 s.
Predicted central event time for my location: 01:03:27 (UTC).

Star altitude at 24 deg.
Star azimut at 96 deg (East).

The sky was without clouds. Air was calm. Star images showed a small turbulence.