Graze logo


ASTROMETRIC UPDATE:
OCCULTATION BY (146) LUCINA - 1999 DECEMBER 30

THIS UPDATE REPLACES THE PREVIOUS UPDATE OF 28 DECEMBER.


CHECK THIS PAGE REGULARLY FOR FURTHER UPDATES AND CHANGES TO THE TRACK.

YOU MUST RELOAD THIS PAGE USING YOUR BROWSER'S
RELOAD/REFRESH BUTTON TO OBTAIN UPDATES!

[Prediction by Edwin Goffin]

[Prediction using OCCULT software]

Goffin's predicted path passes from the northern Flinders Ranges in South Australia through the NSW coast north of Sydney. Goffin's prediction uses the GSC co-ordinates for the target star. The path predicted by OCCULT using the same star position is virtually identical. The OCCULT path using the Tycho catalogue star location passes across far southern Tasmania and the southern half of the South Island of New Zealand (albeit at sunrise). It is this path that is presented at the above link.


NEW UPDATE: 29 December 1999

This prediction update has been computed by Stephen Kerr based on astrometry from Bill Owen at the Table Mountain Observatory. The TYC position of the target star has been used. This NEW update incorporates two additional asteroid positions (13 December 1999) and as such represents all of the astrometry likely to be available prior to this event. The effect of this update is to move the path slightly to the north (around 0.2 of a path width) with no impact on timing. Given this very small change, the essential details for the event remain unchanged and the text below is not significantly altered from the previous update.

Summary:

The update suggests a shift of about 2 path widths to the south and 150 seconds earlier than that predicted by Goffin. As suggested above, a significant amount of this difference is due to the use of the Tycho Catalogue position of the star instead of the GSC location. The updated path passes just to the south of Adelaide (16:55:00 UTC at very low altitude), just to the north of Melbourne and south of Canberra (16:55:25 UTC). This path also crosses Auckland (16:56:45 UTC) just before local sunrise.

THE EVENT AT ONE GLIMPSE: The Occultation Path: Data for the target star: Data for the minor planet: Data for the event:

Lucina Update

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.

Use these links for further information:
[Planetary Occultations] [Using the Predictions]
[Observing Details] [Timing Details] [Reporting Details] [Report Form]
[Asteroid Occultation Results]


This page may have been updated since 29 December 1999.
Hit your browser's RELOAD button to get the latest version.

[Site Map] [What's an Occultation?]
[Total Occultations] [Grazing Occultations] [Planetary Occultations] [Jovian Satellite Eclipses]
[Timing Occultations] [Reporting Observations] [Coming Events] [Software]
[About Us] [Publications] [Membership] [Links]

[Top of Page][Return to Home Page]