Occultation event with (13060) 91EJ, event index number 3830
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/07/05 21:58:17 UTC
J2000 position of star is 10:38:16.9 -14:06:25
Equinox of date position of star is 10:39:35.4 -14:14:43
Star is 160 degrees from the moon. Moon is 70% illuminated.
Stellar brightness G=14.6, apparent brightess of occulting body is G=16.9
Use an exposure time of 0.35 seconds with the standard RECON-QHY system.
SNR of 7.4 per integration for unocculted signal
Expected flux drop is 90% with SNR of 6.6 for the occulted depth (per occulted point)
Apparent velocity is 25.8 km/sec on the sky relative to the star, or, 21.1 arcsec/hr.
Position angle of asteroid motion is 96.5 degrees
The recommended exposure time corresponds to 9.0 km per image.
The 1-sigma error in the time of the event is 0.9 seconds.
The 1-sigma cross-track error in the shadow position is 29.8 km.
The sky-plane scale is 4410.3 km/arcsec.
Diameter estimates:
41.9 km assuming a 5% albedo, maximum of 1.6 sec for a central chord
17.1 km assuming a 30% albedo, maximum of 0.7 sec for a central chord
Cross-track diameter of 36.1 km used for deployment plan.
Star training set for 13060_91EJ, (2026/07/05 21:58UT) Object RA Dec mag sep mel Regulus 10:09:46.9 +11:50:12 1.3 27.11 159 Alphard 09:28:53.4 -08:46:29 2.0 18.15 149 PPM 223226 10:38:51.9 -13:31:24 4.8 0.74 161 PPM 223309 10:42:24.6 -14:29:50 8.3 0.73 161 PPM 223244 10:39:45.3 -14:14:42 8.6 0.04 160 13060_91EJ 10:39:35.4 -14:14:43 16.9 160 Positions are for equinox of date
Star training set for 13060_91EJ, (2026/07/05 21:58UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 27.11 159 Alphard 09:27:35.2 -08:39:30 2.0 18.15 149 PPM 223226 10:37:33.4 -13:23:06 4.8 0.74 161 PPM 223309 10:41:06.2 -14:21:29 8.3 0.73 161 PPM 223244 10:38:26.9 -14:06:24 8.6 0.04 160 13060_91EJ 10:38:16.9 -14:06:25 16.9 160 Positions are for J2000