Occultation event with (5244) Amphilochos, event index number 3299
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/02/23 20:20:59 UTC
J2000 position of star is 12:07:02.4 -05:21:14
Equinox of date position of star is 12:08:22.9 -05:29:58
Star is 128 degrees from the moon. Moon is 42% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 40% with SNR of 1.3 for the occulted depth (per occulted point)
Apparent velocity is 13.5 km/sec on the sky relative to the star, or, 15.1 arcsec/hr.
Position angle of asteroid motion is 114.0 degrees
The recommended exposure time corresponds to 8.8 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 27.3 km.
The sky-plane scale is 3218.3 km/arcsec.
Diameter estimates:
46.3 km assuming a 5% albedo, maximum of 3.4 sec for a central chord
18.9 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 36.7 km used for deployment plan.
Star training set for 5244_Amphilochos, (2026/02/23 20:21UT) Object RA Dec mag sep mel Spica 13:26:34.5 -11:17:49 1.0 20.18 147 4Gam Crv 12:17:09.3 -17:41:13 2.6 12.37 134 PPM 178683 12:07:20.2 -03:16:38 6.4 2.24 126 PPM 195192 12:10:20.5 -05:17:41 8.3 0.53 128 PPM 195165 12:08:54.0 -05:39:10 9.4 0.20 128 5244_Amphiloch 12:08:22.9 -05:29:58 15.7 128 Positions are for equinox of date
Star training set for 5244_Amphilochos, (2026/02/23 20:21UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 20.18 147 4Gam Crv 12:15:48.1 -17:32:30 2.6 12.37 134 PPM 178683 12:05:59.8 -03:07:54 6.4 2.24 126 PPM 195192 12:09:00.0 -05:08:57 8.3 0.53 128 PPM 195165 12:07:33.4 -05:30:27 9.4 0.20 128 5244_Amphiloch 12:07:02.4 -05:21:14 15.7 128 Positions are for J2000