Occultation event with (6090) Aulis, event index number 3352
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/03/05 07:37:43 UTC
J2000 position of star is 10:30:31.7 +04:19:55
Equinox of date position of star is 10:31:53.2 +04:11:49
Star is 29 degrees from the moon. Moon is 96% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=14.4
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 17% with SNR of 0.5 for the occulted depth (per occulted point)
Apparent velocity is 18.4 km/sec on the sky relative to the star, or, 20.7 arcsec/hr.
Position angle of asteroid motion is 98.9 degrees
The recommended exposure time corresponds to 14.7 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 26.0 km.
The sky-plane scale is 3209.1 km/arcsec.
Diameter estimates:
75.2 km assuming a 5% albedo, maximum of 4.1 sec for a central chord
30.7 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 59.6 km used for deployment plan.
Star training set for 6090_Aulis, (2026/03/05 07:38UT) Object RA Dec mag sep mel Regulus 10:09:45.8 +11:50:18 1.3 9.40 37 PPM 156779 10:24:36.1 +05:33:38 6.5 2.27 31 PPM 156935 10:33:40.0 +04:30:37 7.6 0.54 29 PPM 156910 10:32:03.3 +03:46:05 9.4 0.43 29 PPM 156926 10:33:12.6 +03:55:30 11.0 0.43 29 6090_Aulis 10:31:53.2 +04:11:49 14.4 29 Positions are for equinox of date
Star training set for 6090_Aulis, (2026/03/05 07:38UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 9.40 37 PPM 156779 10:23:14.2 +05:41:37 6.5 2.27 31 PPM 156935 10:32:18.5 +04:38:44 7.6 0.54 29 PPM 156910 10:30:41.9 +03:54:11 9.4 0.43 29 PPM 156926 10:31:51.2 +04:03:37 11.0 0.43 29 6090_Aulis 10:30:31.7 +04:19:55 14.4 29 Positions are for J2000