Occultation event with (5244) Amphilochos, event index number 3723
Regions able to see the event: Europe
Geocentric closest approach at 2026/05/07 02:25:35 UTC
J2000 position of star is 11:39:27.8 -01:31:45
Equinox of date position of star is 11:40:48.8 -01:40:31
Star is 109 degrees from the moon. Moon is 76% illuminated.
Stellar brightness G=16.7, apparent brightess of occulting body is G=15.9
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 34% with SNR of 1.0 for the occulted depth (per occulted point)
Apparent velocity is 7.1 km/sec on the sky relative to the star, or, 7.6 arcsec/hr.
Position angle of asteroid motion is 133.5 degrees
The recommended exposure time corresponds to 8.8 km per image.
The 1-sigma error in the time of the event is 4.4 seconds.
The 1-sigma cross-track error in the shadow position is 16.8 km.
The sky-plane scale is 3349.4 km/arcsec.
Diameter estimates:
46.3 km assuming a 5% albedo, maximum of 6.6 sec for a central chord
18.9 km assuming a 30% albedo, maximum of 2.7 sec for a central chord
Cross-track diameter of 36.7 km used for deployment plan.
Star training set for 5244_Amphilochos, (2026/05/07 02:26UT) Object RA Dec mag sep mel Regulus 10:09:46.4 +11:50:15 1.3 26.34 136 Denebola 11:50:24.1 +14:25:29 2.1 16.27 114 91Ups Leo 11:38:17.9 -00:58:10 4.3 0.95 110 PPM 178552 11:39:19.5 -01:44:40 8.0 0.38 110 PPM 178563 11:41:05.0 -01:35:13 8.8 0.11 109 5244_Amphiloch 11:40:48.8 -01:40:31 15.9 109 Positions are for equinox of date
Star training set for 5244_Amphilochos, (2026/05/07 02:26UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 26.34 136 Denebola 11:49:02.7 +14:34:16 2.1 16.27 114 91Ups Leo 11:36:56.9 -00:49:25 4.3 0.95 110 PPM 178552 11:37:58.6 -01:35:55 8.0 0.38 110 PPM 178563 11:39:44.0 -01:26:27 8.8 0.11 109 5244_Amphiloch 11:39:27.8 -01:31:45 15.9 109 Positions are for J2000