Occultation event with (13060) 91EJ, event index number 3116
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/01/06 09:23:33 UTC
J2000 position of star is 10:59:10.0 -17:54:45
Equinox of date position of star is 11:00:27.1 -18:03:09
Star is 36 degrees from the moon. Moon is 89% illuminated.
Stellar brightness G=14.4, apparent brightess of occulting body is G=16.6
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 9.4 per integration for unocculted signal
Expected flux drop is 88% with SNR of 8.3 for the occulted depth (per occulted point)
Apparent velocity is 12.0 km/sec on the sky relative to the star, or, 11.4 arcsec/hr.
Position angle of asteroid motion is 24.5 degrees
The recommended exposure time corresponds to 4.8 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 31.1 km.
The sky-plane scale is 3794.9 km/arcsec.
Diameter estimates:
41.9 km assuming a 5% albedo, maximum of 3.5 sec for a central chord
17.1 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 36.1 km used for deployment plan.
Star training set for 13060_91EJ, (2026/01/06 09:24UT) Object RA Dec mag sep mel Regulus 10:09:45.3 +11:50:21 1.3 32.40 4 4Gam Crv 12:17:08.9 -17:41:10 2.6 18.24 47 7Alp Crt 11:01:02.7 -18:26:16 4.1 0.41 36 PPM 223750 11:00:33.3 -17:45:47 8.0 0.29 36 PPM 223748 11:00:32.8 -17:57:18 9.5 0.10 36 13060_91EJ 11:00:27.1 -18:03:09 16.6 36 Positions are for equinox of date
Star training set for 13060_91EJ, (2026/01/06 09:24UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 32.40 4 4Gam Crv 12:15:48.1 -17:32:30 2.6 18.24 47 7Alp Crt 10:59:45.6 -18:17:52 4.1 0.41 36 PPM 223750 10:59:16.1 -17:37:24 8.0 0.29 36 PPM 223748 10:59:15.7 -17:48:55 9.5 0.10 36 13060_91EJ 10:59:10.0 -17:54:45 16.6 36 Positions are for J2000