THE EVENT AT ONE GLIMPSE:

• Date and approx. UT time of event: July 13, 1999 @ 13:24 UT
• Magnitude of target star: 9.75
• Magnitude drop [mag]: 3.1
• Estimated maximum duration [s]: 4.7
• Path description: Path runs across Australia from Brisbane to Adelaide.

• Name: TYC 6851 04314
• J2000 position [h,m,s; o,',"]: 18h 12m 24.878s; -27^o 37' 42.32"
• Position source: ACT
• V mag [mag]: 12.81
• Remarks:

• Number, name: (237) Coelestina
• Approx. diameter [km]: 44
• Source of used astrometry: USNO
• Number of used observations: 7

• UT date and time of least geocentric approach: 13:23.9 UT
• Approx. V mag of minor planet at event [mag]: 12.81
• Geocentric parallax of minor planet ["]: 5.57
• Apparent motion of minor planet ["/h]: 29.57
• Magnitude drop [mag]: 3.1
• Estimated maximum duration [s]: 4.7
• Angular distance to moon, phase of moon [deg,%]: 155, 0%

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.