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ASTROMETRIC UPDATE:
OCCULTATION BY (191) KOLGA - 2000 SEPTEMBER 2

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[Prediction by Edwin Goffin]

[Prediction using OCCULT software]

[Detailed finder chart by Stephen Kerr]

Goffin's path runs from the north-west crossing the Kimberley area in daylight then on to the central part of the Northern Territory at local sunset and southern Queensland. The path runs very close to Brisbane before crossing the northern Tasman Sea passing to the north of the North Island of New Zealand. The path given by OCCULT is virtually indistinguishable, passing through the northern suburbs of Brisbane and Sunshine Coast area around 20 seconds earlier than Goffin's path.


UPDATE: 30 August 2000

This prediction update has been computed by Stephen Kerr based on astrometry from Ron Stone of the US Naval Observatory - Flagstaff Station. The ACT position of the target star has been used.

Summary:

This update indicates a shift in the predicted path to the south-west of around 1.5 path widths relative to Goffin's prediction and slightly (5 - 10 second) earlier. The path now crosses the southern parts of the Darling Downs and the southern limits of the Brisbane metropolitan area as well as the Gold and Tweed coast areas (around 9:02 UT). Observations from the North Island of New Zealand will also be very worthwhile. The closest approach of the path to New Zealand is around 9:03:20 UT when it will pass only 3 path widths to the north of Auckland - obviously Whangarei and Northland will be even closer.

Observers should note that the target star is the fainter of a pair. The magnitude 9.7 star TYC 5616 37 is only 60" to the north east of the target star. The two star images are not clearly seperated in the charts on Edwin Goffin's predictions. A more detailed finder chart is attached to this update and can be reached by clicking here.

THE EVENT AT ONE GLIMPSE: The Occultation Path: Data for the target star: Data for the minor planet: Data for the event:

Kolga 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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