Occultation event with (6090) Aulis, event index number 3681
Regions able to see the event: UAE
Geocentric closest approach at 2026/04/24 20:26:37 UTC
J2000 position of star is 10:12:20.9 +04:58:02
Equinox of date position of star is 10:13:43.2 +04:50:11
Star is 21 degrees from the moon. Moon is 58% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=15.1
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 6.4 per integration for unocculted signal
Expected flux drop is 29% with SNR of 1.9 for the occulted depth (per occulted point)
Apparent velocity is 3.5 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
Position angle of asteroid motion is 79.0 degrees
The recommended exposure time corresponds to 7.0 km per image.
The 1-sigma error in the time of the event is 5.9 seconds.
The 1-sigma cross-track error in the shadow position is 34.2 km.
The sky-plane scale is 3532.6 km/arcsec.
Diameter estimates:
75.2 km assuming a 5% albedo, maximum of 21.6 sec for a central chord
30.7 km assuming a 30% albedo, maximum of 8.8 sec for a central chord
Cross-track diameter of 59.6 km used for deployment plan.
Star training set for 6090_Aulis, (2026/04/24 20:27UT) Object RA Dec mag sep mel Regulus 10:09:46.2 +11:50:15 1.3 7.07 16 14 Sex 10:08:09.9 +05:28:56 6.2 1.53 19 19 Sex 10:14:10.4 +04:29:01 6.7 0.37 21 PPM 156596 10:12:58.8 +05:02:34 9.7 0.28 20 6090_Aulis 10:13:43.2 +04:50:11 15.1 21 Positions are for equinox of date
Star training set for 6090_Aulis, (2026/04/24 20:27UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 7.07 16 14 Sex 10:06:47.4 +05:36:41 6.2 1.53 19 19 Sex 10:12:48.2 +04:36:52 6.7 0.37 21 PPM 156596 10:11:36.5 +05:10:24 9.7 0.28 20 6090_Aulis 10:12:20.9 +04:58:02 15.1 21 Positions are for J2000