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ASTROMETRIC UPDATE:
OCCULTATION BY (143) ADRIA - 2000 JUNE 19

THIS UPDATE REPLACES THE PREVIOUS UPDATE OF 12 JUNE.


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[Prediction by Edwin Goffin]

[Prediction using OCCULT software]

[Detailed finder chart by Jan Manek]

Goffin's path crosses the northern New South Wales coast just north of Newcastle running west to cross the Western Australian coast near Carnarvon. The OCCULT path lies around 0.4" to the north and around 1 minute earlier. It passes just to the south of Brisbane and runs to the Western Australian coast between Onslow and Karratha.


UPDATE: 15 June 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 Tycho-2 position of the target star has been used.

Summary:

The updated path lies around 0.5 of a path width to the south and around 0.1 minutes earlier than that given by Edwin Goffin. The path crosses the New South Wales coast near Taree (14:48:30 UT), running just north of Broken Hill (14:51 UT) and crossing the Western Australian just south of Carnarvon (14:54:30 UT). Newcastle and the northern suburbs of Sydney lie within the error bounds of this update. Note that in the map below, the circles represent the centre-line of the path rather than the time graduated lines.

The target star is the northern and brighter component of a close (seperation = 12") pair with TYC 7915 01589 (mag = 10.5). This detail is NOT visible in the predictions prepared by Edwin Goffin but is shown in a second finder chart
attached to this update.

In order to detect the occultation, observers must clearly seperate the components of this close pair and monitor the northern component seperately.

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

Adria 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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