============SAMPLE REPORT FORM================
REMEMBER TO SEND A COPY OF YOUR SUCCESSFUL OBSERVATION OR "MISS" OBSERVATION TO BOTH:
DAVID DUNHAM : dunham @ erols.com and JAN MANEK: jmanek @ mbox.vol.cz
IOTA ASTEROID OCCULTATION REPORT
FORM
Asteroid (or other object): 161 Athor
Star: TYC 1808 1356-1
Date (UT): 15 Oct 2002
Predicted Time (UT): 5:31:30
Observer Name: Richard Nugent
E-mail Address: Fax:
TELESCOPE: Aperture: 4" Focal length: 1000mm f/10
Type: Meade 2045D
Eyepiece Power: n/a Observing site name:
3 miles southeast of Streetman, TX on Hwy 75
Longitude: West 96°
18' 37.9" Latitude: 31°
51' 57.9" North. Determined by Garmin GPS model "etrex"
unit. DATUM: WGS84
Height above sea level: 111 m How determined?: Garmin GPS
model "etrex".
NOTE: This GPS unit quoted accuracy to 5-7 meters.
Sky Transparency (Circle one, or delete two): Very Good, Stars m = 5.0 visible,
1st quarter Moon was in opposite part of sky
Star Image Stability ("seeing"; as above): very good, images were steady
Other Conditions: (Wind, Clouds, Lights, etc.): Temperature during occultation
approx. 50-52 F.
Time Source: WWV 5,000 kHz Recording method: Image intensified video
Supercircuits PC-164C and WWV direct feed
simultaneously into camcorder.
Was the Asteroid Visible in your Scope? It was faintly visible on video.
Meaning barely detectable.
EVENT TIMINGS: (All times in Universal Time)
Universal Time Estimated Accuracy
Reaction (estimated error)
h m s
time
Started Recording:
5: 29: 45.0
Star and Object Merged:
Disappearance:
5: 31: 40.9
+/- 0.1 sec
n/a
Estimated Closest Approach:
(if no D/R)
Reappearance:
5: 31: 46.6
+/- 0.1 sec
n/a
Star and Object Separated:
Stopped Recording:
5: 33: 10.0
DURATION OF EVENT: 5.7 +/- 0.1 seconds
Was your reaction time applied to the above timings? Yes, reductions done from
video
If you could tell, did the object pass NORTH, SOUTH, EAST, WEST of target star
(circle one, or delete three)? If possible, estimate the
distance of closest approach in arc seconds:
List all Interruptions in Observing: Reason
From ___:___:___ to ___:___:___ __________________________________
From ___:___:___ to ___:___:___ __________________________________
ADDITIONAL COMMENTS: Met with Dave Dunham, who is in Houston on business and for
the IOTA annual meeting. Loaned him a C-8, radio and tape recorder from Marg
Nunez, and we drove up I-45 North to sites. A cold front had just moved thru
just a few hours prior and cleared the skies. David set up just inside the
southern limit and I set up 1/3 path width inside the southern limit.
Communicated with Ed Vinson and Wayne Hutchinson during the 3 hour drive and we
finalized our positions. Skies were clear with some dew formation.
Setting up on a warm car hood eliminated dew formation for me !
Disappearance and reappearance were instantaneous, with no visible dimming. No
visible blinks were observed during the 5 minute window surrounding the event.
Time reductions were done watching video visually frame by frame and computer
stopwatch program.