Occultation event with (884) Priamus, event index number 4162
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/09/03 03:04:06 UTC
J2000 position of star is 05:50:02.9 +29:18:45
Equinox of date position of star is 05:51:44.9 +29:19:06
Star is 33 degrees from the moon. Moon is 64% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=14.8
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 7.2 per integration for unocculted signal
Expected flux drop is 34% with SNR of 2.4 for the occulted depth (per occulted point)
Apparent velocity is 19.8 km/sec on the sky relative to the star, or, 16.4 arcsec/hr.
Position angle of asteroid motion is 85.0 degrees
The recommended exposure time corresponds to 24.8 km per image.
The 1-sigma error in the time of the event is 0.1 seconds.
The 1-sigma cross-track error in the shadow position is 33.7 km.
The sky-plane scale is 4366.4 km/arcsec.
Diameter estimates:
112.7 km assuming a 5% albedo, maximum of 5.7 sec for a central chord
46.0 km assuming a 30% albedo, maximum of 2.3 sec for a central chord
Cross-track diameter of 101.1 km used for deployment plan.
Star training set for 884_Priamus, (2026/09/03 03:04UT) Object RA Dec mag sep mel Aldebaran 04:37:27.3 +16:33:39 0.8 21.29 18 Alnath 05:27:58.8 +28:37:39 1.6 5.24 28 PPM 095117 05:58:15.5 +28:56:38 6.5 1.47 34 PPM 094916 05:50:35.5 +29:08:34 8.3 0.31 33 884_Priamus 05:51:44.9 +29:19:06 14.8 33 Positions are for equinox of date
Star training set for 884_Priamus, (2026/09/03 03:04UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 21.29 18 Alnath 05:26:17.6 +28:36:22 1.6 5.24 28 PPM 095117 05:56:33.8 +28:56:32 6.5 1.47 34 PPM 094916 05:48:53.6 +29:08:11 8.3 0.31 33 884_Priamus 05:50:02.9 +29:18:45 14.8 33 Positions are for J2000