Occultation event with (5023) Agapenor, event index number 3166
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/01/23 05:44:01 UTC
J2000 position of star is 11:10:39.4 -03:00:03
Equinox of date position of star is 11:11:59.2 -03:08:34
Star is 172 degrees from the moon. Moon is 20% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.70 seconds with the standard RECON-QHY system.
SNR of 5.5 per integration for unocculted signal
Expected flux drop is 55% with SNR of 3.0 for the occulted depth (per occulted point)
Apparent velocity is 9.5 km/sec on the sky relative to the star, or, 10.3 arcsec/hr.
Position angle of asteroid motion is 82.1 degrees
The recommended exposure time corresponds to 6.6 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 31.4 km.
The sky-plane scale is 3329.3 km/arcsec.
Diameter estimates:
49.4 km assuming a 5% albedo, maximum of 5.2 sec for a central chord
20.2 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 27.9 km used for deployment plan.
Star training set for 5023_Agapenor, (2026/01/23 05:44UT) Object RA Dec mag sep mel Regulus 10:09:45.4 +11:50:20 1.3 21.53 154 Denebola 11:50:23.3 +14:25:35 2.1 19.98 166 61 Leo 11:03:09.5 -02:37:32 6.1 2.26 170 PPM 194153 11:09:37.8 -04:02:19 8.2 1.07 171 PPM 194182 11:11:42.6 -03:15:04 9.9 0.13 171 5023_Agapenor 11:11:59.2 -03:08:34 15.7 172 Positions are for equinox of date
Star training set for 5023_Agapenor, (2026/01/23 05:44UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 21.53 154 Denebola 11:49:02.7 +14:34:16 2.1 19.98 166 61 Leo 11:01:49.7 -02:29:06 6.1 2.26 170 PPM 194153 11:08:18.2 -03:53:49 8.2 1.07 171 PPM 194182 11:10:22.9 -03:06:34 9.9 0.13 171 5023_Agapenor 11:10:39.4 -03:00:03 15.7 172 Positions are for J2000