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A 5.4 second occultation was recorded by Dave Gault, using video OSD technique.
View the updated prediction.
Observers:
1 D Gault,Hawkesbury Heights,NSW, AU
2(M) C Wyatt,Walcha, NSW, AU
3(P) Prediction Nov 13
Discussion:
The circle above is plotted at the expected 151 km diameter of Berberica. With only one chord it is not possible to determine whether Dave was north or south of the central line of the event. Chris was observing visually and unusually in this event the MP was brighter than the star making the dip of only m 0.46 difficult to observe visually. While it appears likely that the updated prediction was approximately correct the plot is shown centered on Dave's chord as this gives the least error estimate.
The figure below shows the light curve of the occultation measured by Dave.
Observational Data:
Observation details for MP (776) Berbericia
By Star UCAC2 41349474
On 2008-11-29 at 15:39:15.0
_______________________________
Observer Dave Gault
Location Hawkesbury Heights
Longitude +150:38:27.8
Latitude -33:39:52.
Altitude 286 m
Datum WGS84
Telescope Newtonian
Aperture 25 cm
Seeing Steady Clear
Timing GPS - time inserted Video with frame analysis
Disappearance 15:39:08.60
Reappearance 15:39:14.00
Comments: WAT-120N camera 8 frame stack. Light curve attached.
_______________________________
Observer Christopher G Wyatt
Location Walcha, NSW
Longitude +151:32:1.6
Latitude -31:20:58.4
Altitude 1225 m
Datum WGS84
Telescope SCT including Cass and Mak
Aperture 20 cm
Seeing Slight flickering Star faint
Timing Tape Recorder + time signal Visual, no PE applied
Star & Asteroid separated: 15:49
Missed
Comments: The star was faint, and the asteroid brighter, an expected mag drop
of 0.46 mag was not detected visually at x266 using the 8" SCT @ f/10.
I was suitably located. The times of asteroid/star merging was not recorded,
but I did mention the approximate time when I started to see the asteroid and
star split. The time given is approximate.