Occultation event with (13060) 91EJ, event index number 3294
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/02/23 07:19:00 UTC
J2000 position of star is 10:41:34.4 -19:15:47
Equinox of date position of star is 10:42:50.7 -19:24:01
Star is 120 degrees from the moon. Moon is 36% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=16.2
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 3.8 per integration for unocculted signal
Expected flux drop is 61% with SNR of 2.3 for the occulted depth (per occulted point)
Apparent velocity is 18.0 km/sec on the sky relative to the star, or, 18.6 arcsec/hr.
Position angle of asteroid motion is 97.9 degrees
The recommended exposure time corresponds to 9.0 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 28.9 km.
The sky-plane scale is 3477.1 km/arcsec.
Diameter estimates:
41.9 km assuming a 5% albedo, maximum of 2.3 sec for a central chord
17.1 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 36.1 km used for deployment plan.
Star training set for 13060_91EJ, (2026/02/23 07:19UT) Object RA Dec mag sep mel Regulus 10:09:45.7 +11:50:18 1.3 32.28 101 Alphard 09:28:52.3 -08:46:24 2.0 20.82 100 PPM 223444 10:48:09.1 -17:26:08 5.7 2.33 121 PPM 223386 10:45:37.7 -19:16:47 8.3 0.67 121 PPM 223328 10:43:10.6 -19:23:20 9.5 0.08 120 13060_91EJ 10:42:50.7 -19:24:01 16.2 121 Positions are for equinox of date
Star training set for 13060_91EJ, (2026/02/23 07:19UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 32.28 101 Alphard 09:27:35.2 -08:39:30 2.0 20.82 100 PPM 223444 10:46:52.1 -17:17:50 5.7 2.33 121 PPM 223386 10:44:21.2 -19:08:31 8.3 0.67 121 PPM 223328 10:41:54.3 -19:15:06 9.5 0.08 120 13060_91EJ 10:41:34.4 -19:15:47 16.2 120 Positions are for J2000