This prediction update has been computed by Stephen Kerr based on astrometry from Ron Stone of the US Naval Observatory - Flagstaff Station. The Tycho-1 position of the target star has been used.

Summary:

The path produced in this update is virtually indistinguishable from that given by Goffin with a 40 seconds delay. The path crosses the New South Wales coast near Taree (14:49:25 UT), running just north of Broken Hill (14:51 UT) and crossing the Western Australian coast at Carnarvon (14:55:30 UT).

• Date and approx. UT time of event: June 19, 2000 @ 14:49 UT
• Magnitude of target star: 10.08
• Magnitude drop [mag]: 2.8
• Estimated maximum duration [s]: 9.0
• Path description: See above.
• Goffin's original chart reference: A00_0611

• Approximate width [km]: 95
• Map: See below

• Name: TYC 7915 1609
• Constellation: Corona Australia
• J2000 position [h,m,s; ^o,',"]: 18h 42m 33.789s; -38^o 57' 32.68"
• Position source: Tycho 1
• B-V (mag) = +0.399
• Remarks:
• The target star is in Corona Australis. It lies 38' south-west of lambda Corona Australis (magnitude = 5.1). The magnitude 8.5 star PPM 749954 lies only 1.5' south west of the target star and there is a magnitude 10.5 star (TYC 7915 1589) only 12" to the south. Careful observation will be required to monitor this event.

• Number, name: (143) Adria
• Approx. diameter [km]: 93
• Source of used astrometry: US Naval Observatory - Flagstaff Station (Ron Stone)
• Number of used observations: 6
• Number of rejected observations: 0
• Time covered by the observations: 2000 05 25 - 2000 06 07

• UT date and time of least geocentric approach: 2000 June 19, 14:48.410 UT
• Approx. V mag of minor planet at event [mag]: 12.81
• Geocentric parallax of minor planet ["]: 5.36
• Magnitude drop [mag]: 2.8
• Estimated maximum duration [s]: 3.0
• Apparent motion of minor planet ["/h]: 31.14
• Angular distance to moon, phase of moon [deg,%]: 24, 94%
• Update computed by: Stephen Kerr - DOS Occult 4.2

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.