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ASTROMETRIC UPDATE:
OCCULTATION BY (221) EOS - 2000 SEPTEMBER 28

THIS UPDATE REPLACES THE PREVIOUS UPDATE OF 23 SEPTEMBER.


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[Prediction by Edwin Goffin]

[Prediction using OCCULT software]

[Detailed finder chart by Jan Manek]

Goffin's path runs south through western Japan, the Philippines and central Indonesia to clip the Western Australian coastline around Exmouth. The path given by OCCULT (using the Tycho 2 star position) lies around 0.4" to the west and two minutes earlier. This path crosses western Java and misses the Australian coastline by about 350 km.


UPDATE: 27 September 2000

This prediction update has been computed by Jan Manek of the Stefanik Observatory based on astrometry from Ron Stone of the US Naval Observatory - Flagstaff Station. The TYC-2 position of the target star has been used.

Summary:

This update indicates a shift in the predicted path to the west of around 0.6" relative to Goffin's prediction and slightly (0.7 minute) earlier. The new path crosses central western Java running south to miss the Australian coastline by around 500 km. The closest approach to Exmouth occurs at 20:05 UT and to Perth at 20:08 UT.

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

Eos 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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