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ASTEROIDAL 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: 28 Nov 2021
   STAR: TYC 2285-01057-1
   ASTEROID: (202421) 2005UQ513

2. OBSERVER
   Name: Stefano SPOSETTI
   Address: 6525 GNOSCA - Switzerland
   Email: stefanosposetti@ticino.com

3. OBSERVING STATION
   Nearest city: CH-6743 Giornico
   Longitude: 8d 51m 56.4s (E)
   Latitude: 46d 24m 22.8s (N)
   Altitude: 460 m
   (WGS84)

4. TIMING OF EVENTS
   Occultation recorded: NEGATIVE
   Type of event:
   "S"tart observation;
   "E"nd observation;

   Personal Equation Substracted: -
   Event Time (UTC) Accuracy + Comments
   code: HH:MM:SS.ss S.sss

-S1 : 17:55:32
-E1 : 17:56:18

-S2 : 17:56:26
-E2 : 18:02:44

-S3 : 18:02:48
-E3 : 18:10:05

5. TELESCOPE
   Type: Schmidt-Cassegrain, Celestron 8-inch
   Aperture: 200 mm
   Focal length: ~ 900 mm (with focal reducer)
   Magnification: -
   Mount: Equatorial
   Motor drive: Yes

6. TIMING & RECORDING
   -Camera/Sensor: Videocamera WAT-910HX-RC, CCIR, 1/2", ICX429ALL sensor
   -Videocamera settings: Shutter = 1/50 s; Gain = 41/41; Gamma = 1.00
   -Device of recording: Personal computer
   -Videograbber: Logilink USB Grabber VG0001, composite input
   -Software: Virtualdub v. 1.10.4, saved on Harddisk as Huffyuv compressed file
   -Time insertion device: IOTA-VTI, v.1.1.42
   -Timekeeping: GPS 1PPS (US Global Sat EM-406A)
   -Integration time: 0.040 s

7. OBSERVING CONDITIONS
   -Atmospheric transparency: fair/good
   -Wind: light
   -Star image stability: fair
   -Minor Planet Visible: -

8. ADDITIONAL COMMENTS
   -Some clouds prevented the recording with sufficient advance
   -When the sky cleared I could record with integration time of 0.080 s. Therefore, from S1 to E1, the integration time was 0.080 s (Watec camera used with x4 mode)
   -From S2 to E3 the integration time was 1/50 s
   -From E2 to S3 the telescope was shaked inadvertently
   -The Tangra analysis was performed without frame deinterlacing
   -TNO object
   -Occultwatcher, LuckyStar prediction, ~18 % probability for the location