Two very favourable occultation events are predicated for Wed Sept 14th 2229UT (48-Doris) and Sun Sept 18th 2158UT (2-Pallas) as indicated at these links.
http://www.asteroidoccultation.com/2011_09/0914_48_24040.htm
http://www.asteroidoccultation.com/2011_09/0918_2_24051.htm
I encourage you all to monitor these events, as they are of long durations (18 and 33sec), so that CCD time resolution of 1 sec will give good results.
Photometry will be necessary as the magnitude drops are 0.3 in both cases so we must aim for good s/n and get a comparison star in the same field. I leave this to you !
(2) Pallas is exclusively a UK event as the predicted track does not pass over Europe.
It would be a tremendous result if we can get some good chords. All observations will contribute to the result. Predictions can be wrong, so that observers outside the tracks are equally valuable – that includes my location.
TIP: Remember to set your PC clock to UT as accurately as possible so that CCD frame times can be deduced. An internet time service is commonly used to achieve this. I use Dimension 4. Im sure you are all well aware of this aspect 😉 Results are dependant on reliable UT of disappearance and reappearance.
Video observers will be familiar with Limovie for photometry of AVI files.
Summary info can be found here http://www.maidenhead-astro.net/astocc/
Please contact me if you have any questions.
I do hope the weather is good.
Best wishes,
Tim
Tim Haymes
ARPS assistant director occultations
Basingstoke Astronomical Society 