Occultation event with (5652) Amphimachus, event index number 1455
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/11/04 09:33:41 UTC
J2000 position of star is 11:45:24.1 -00:07:41
Equinox of date position of star is 11:46:43.6 -00:16:18
Star is 151 degrees from the moon. Moon is 98% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=16.2
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 53% with SNR of 1.6 for the occulted depth (per occulted point)
Apparent velocity is 33.0 km/sec on the sky relative to the star, or, 26.6 arcsec/hr.
Position angle of asteroid motion is 114.6 degrees
The recommended exposure time corresponds to 19.8 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 21.7 km.
The sky-plane scale is 4462.7 km/arcsec.
Diameter estimates:
54.7 km assuming a 5% albedo, aximum of 1.7 sec for a central chord
22.3 km assuming a 30% albedo, maximum of 0.7 sec for a central chord
Cross-track diameter of 53.9 km used for deployment plan.
Star training set for 5652_Amphimachus, (2025/11/04 09:34UT) Object RA Dec mag sep mel Regulus 10:09:44.7 +11:50:24 1.3 26.95 124 Denebola 11:50:22.6 +14:25:39 2.1 14.73 143 91Ups Leo 11:38:16.4 -00:58:00 4.3 2.22 149 PPM 178587 11:46:20.8 -00:39:44 7.6 0.40 151 PPM 178583 11:46:04.8 -00:13:49 9.9 0.17 151 5652_Amphimach 11:46:43.6 -00:16:18 16.2 151 Positions are for equinox of date
Star training set for 5652_Amphimachus, (2025/11/04 09:34UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 26.95 124 Denebola 11:49:02.7 +14:34:16 2.1 14.73 143 91Ups Leo 11:36:56.9 -00:49:25 4.3 2.22 149 PPM 178587 11:45:01.3 -00:31:07 7.6 0.40 151 PPM 178583 11:44:45.4 -00:05:12 9.9 0.17 151 5652_Amphimach 11:45:24.1 -00:07:41 16.2 151 Positions are for J2000