Date and approx. Uncertainities are given on the basis of the nominal errors in the observations. The target star is 7.3 degrees SW of the 2.1 mag star alpha Ophiuchi in the northern part of the constellation. The target star is only 2.2' SE of 9.6 mag SAO 122212, or 6.4' SW of 9.3 mag SAO 122223, both of which can serve as comparison stars. These three stars form a nice triangle.
Observations cover almost two years and are of excellent quality.
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. This page may have been updated since 17 August 1999.