Occultation event with (6090) Aulis, event index number 3198
Regions able to see the event: Europe
Geocentric closest approach at 2026/02/01 23:34:59 UTC
J2000 position of star is 10:47:03.5 +03:51:00
Equinox of date position of star is 10:48:24.4 +03:42:43
Star is 28 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=14.4, apparent brightess of occulting body is G=14.7
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 9.7 per integration for unocculted signal
Expected flux drop is 56% with SNR of 5.4 for the occulted depth (per occulted point)
Apparent velocity is 15.4 km/sec on the sky relative to the star, or, 16.9 arcsec/hr.
Position angle of asteroid motion is 92.5 degrees
The recommended exposure time corresponds to 7.7 km per image.
The 1-sigma error in the time of the event is 1.8 seconds.
The 1-sigma cross-track error in the shadow position is 29.0 km.
The sky-plane scale is 3274.2 km/arcsec.
Diameter estimates:
75.2 km assuming a 5% albedo, maximum of 4.9 sec for a central chord
30.7 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 59.6 km used for deployment plan.
Star training set for 6090_Aulis, (2026/02/01 23:35UT) Object RA Dec mag sep mel Regulus 10:09:45.5 +11:50:19 1.3 12.55 16 PPM 157166 10:47:27.1 +06:14:06 6.4 2.53 27 PPM 157151 10:46:34.4 +03:35:32 8.3 0.47 28 PPM 157219 10:50:03.3 +03:47:37 9.2 0.42 29 6090_Aulis 10:48:24.4 +03:42:43 14.7 29 Positions are for equinox of date
Star training set for 6090_Aulis, (2026/02/01 23:35UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 12.55 16 PPM 157166 10:46:05.7 +06:22:22 6.4 2.53 27 PPM 157151 10:45:13.5 +03:43:48 8.3 0.47 28 PPM 157219 10:48:42.4 +03:55:56 9.2 0.42 29 6090_Aulis 10:47:03.5 +03:51:00 14.7 28 Positions are for J2000