Occultation event with (5244) Amphilochos, event index number 971
Regions able to see the event: SAfrica
Geocentric closest approach at 2025/05/14 17:07:13 UTC
J2000 position of star is 09:42:12.3 +08:10:16
Equinox of date position of star is 09:43:33.0 +08:03:16
Star is 111 degrees from the moon. Moon is 96% illuminated.
Stellar brightness G=16.9, apparent brightess of occulting body is G=16.3
Use an exposure time of 1.60 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 37% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 11.9 km/sec on the sky relative to the star, or, 11.3 arcsec/hr.
The recommended exposure time corresponds to 19.1 km per image.
The 1-sigma error in the time of the event is 4.8 seconds.
The 1-sigma cross-track error in the shadow position is 20.4 km.
The sky-plane scale is 3778.3 km/arcsec.
Diameter estimates:
45.9 km assuming a 5% albedo, aximum of 3.9 sec for a central chord
18.8 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 45.9 km used for deployment plan.
Star training set for 5244_Amphilochos, (2025/05/14 17:07UT) Object RA Dec mag sep mel Regulus 10:09:43.2 +11:50:32 1.3 7.47 106 14Omi Leo 09:42:30.1 +09:46:33 3.5 1.74 112 PPM 156131 09:45:04.5 +07:50:07 8.1 0.44 110 PPM 156102 09:43:21.0 +08:00:34 9.2 0.07 111 5244_Amphiloch 09:43:33.0 +08:03:16 16.3 110 Positions are for equinox of date
Star training set for 5244_Amphilochos, (2025/05/14 17:07UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 7.47 106 14Omi Leo 09:41:08.8 +09:53:31 3.5 1.74 112 PPM 156131 09:43:43.9 +07:57:09 8.1 0.44 110 PPM 156102 09:42:00.3 +08:07:34 9.2 0.07 111 5244_Amphiloch 09:42:12.3 +08:10:16 16.3 111 Positions are for J2000