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ASTROMETRIC UPDATE:
OCCULTATION BY (338) BUDROSA - 2001 AUGUST 16

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[Prediction by Edwin Goffin]

[Prediction using OCCULT software]

Goffin's path just misses the northern tip of the North Island of New Zealand before crossing southern Victoria including Melbourne. The path as given by Occult lies around two path widths to the north crossing Wollongong, Canberra and far southeastern South Australia.


UPDATE: 15 August 2001

This prediction update has been computed by Steve Kerr of Rockhampton, Queensland, Australia based on astrometry from Ron Stone of the US Naval Observatory - Flagstaff Station. The Tycho 2 position of the target star has been used.

Summary:

This updated path lies around 1.5 path widths to the north of that given by Goffin and around 20 seconds earlier. The path crosses southern Wollongong (16:03:20 UT), Canberra and Albury before passing just to the north of Melbourne (16:04:10 UT) and through far southeastern South Australia (16:05 UT).

Observers should note that this update is based on only 4 astrometric positions for the asteroid and has a fairly large error tolerance - the dotted circle in the lower left corner of the graphic represents the 95% confidence limit based on the asteroid position ONLY (ie. assumes NO error in star position). As such, an occultation is quite possible in Sydney, Melbourne and Adelaide and even a remote possibility in Auckland (16:00:30 UT).

Observers should also note that the target star is faint - magnitude = 11.75. It is the fainter and western half of a close pair around 80" apart (the other star is TYC (GSC) 5234-00753-1). This star is plotted on the printed versions of Goffin's prediction and is visible within the circle to the lower left of the target star. The asteroid itself is predicted to be magnitude 12.7 at the time and any observer who can comfortably monitor the target star will probably be able to see the asteroid during any occultation.

THE EVENT AT ONE GLIMPSE:

The Occultation Path: Data for the target star: Data for the minor planet: Data for the event:

Budrosa Update

IMPORTANT NOTE!

Astrometric updates such as these should not be taken as definitive, but rather only as an indication of where the true track may lie relative to the original predicted track. Observers must bear in mind that later astrometry, in which the target star is measured in the same field as the asteroid, may still reveal substantial changes to the predicted track and time of the event. For this reason it is most important that observers far from the predicted track still monitor the event.

Use these links for further information:
[Planetary Occultations] [Using the Predictions]
[Observing Details] [Timing Details] [Reporting Details] [Report Form]
[Asteroid Occultation Results]


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