THE UPDATED PATH

This updated path lies around one path width to the north of that given by Goffin and around 30 seconds later. The path runs just to the north of Geraldton just on local sunset at 10:59 UT. Further east, the path passes just south of Tennant Creek in the Northern Territory at 11:01 UT before passing over Cairns on the north Queensland coast at 11:02:30 UT.

Calculation Source

This prediction update has been computed by Steve Preston, Medina (Seattle), Washington, USA based on astrometry from Ron Stone of the US Naval Observatory - Flagstaff Station supplemented with data from the AstDys database. The UCAC position of the target star has been used.

• Date and approx. UT time of event: 2001 November 19 - 11:00 UT
• Magnitude of target star: 10.68
• Magnitude drop [mag]: 3.9
• Estimated maximum duration [s]: 6.8
• Angular distance to moon, phase of moon [deg,%]: 44, 19%
• Goffin's original chart reference: A01_1121

• Approximate width [km]: 98
• Uncertainty [path widths]: +/- 0.77 (1 sigma)
• Remarks: Uncertainities are given on the basis of the nominal star position errors and the expected asteroid positional accuracy.
• Circles along the path are OCCULT calculated exact centerline points !!!!

• Name: TYC 5807-01418-1
• Constellation: Aquarius
• J2000 position [h,m,s; ^o,',"]: 22h 18m 44.7528s; -11^o 15' 18.438"
• Position source: UCAC
• Estimated accuracy ["]: 0.041" (0.030", 0.030")
• V mag [mag]: 10.68
• B-V [mag]: +0.75
• Remarks:
• The target star is in southern Aquarius. It lies two degrees east of 38 Aquarii (magnitude = 5.4).

• Number, name: (260) Huberta
• Approx. diameter [km]: 101.0
• Source of used astrometry: USNO - Flagstaff Station (Ron Stone), AstDys
• Number of used observations: 357
• Number of rejected observations: 29
• Time covered by the observations: 1914 01 18 - 2001 11 10
• Update computed by: Steve Preston, Medina, Washington, USA (Orbfit).

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.