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:

This update places the new path a full 1" to the south-east of the path given by Edwin Goffin and around 40 seconds later. This new path lies around 300km south-east of the South Island of New Zealand - closest approach to Dunedin - 11:57:30 UT.

• Date and approx. UT time of event: June 17, 2000 @ 11:58 UT
• Magnitude of target star: 8.66
• Magnitude drop [mag]: 3.2
• Estimated maximum duration [s]: 7.5
• Path description: See above.
• Goffin's original chart reference: A00_0612

• Approximate width [km]: 110
• Map: See below

• Name: HIP 84192 = PPM 266554 = SAO 285147
• Constellation: Ophiuchus
• J2000 position [h,m,s; ^o,',"]: 17h 12m 36.458s; -27^o 01' 09.40"
• Position source: Tycho 1
• V mag [mag]: 8.66
• Spectral Type: K5
• Remarks:
• The target star is in southern Ophiuchus. It lies 3 degrees south-west of theta Ophiuchi (magnitude = 3.3) and 50' south-west of 36 Ophiuchi (magnitude = 4.3). The magnitude 6.8 star HIP 84144 lies only 6' to the west of the target star.

• Number, name: (164) Eva
• Approx. diameter [km]: 110
• 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 26 - 2000 06 09

• UT date and time of least geocentric approach: 2000 June 17, 11:56.224 UT
• Approx. V mag of minor planet at event [mag]: 11.85
• Geocentric parallax of minor planet ["]: 6.15
• Magnitude drop [mag]: 3.2
• Estimated maximum duration [s]: 7.5
• Apparent motion of minor planet ["/h]: 51.00
• Angular distance to moon, phase of moon [deg,%]: 15, 100%
• 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.