Occultation event with (884) Priamus, event index number 4188
Regions able to see the event: Europe
Geocentric closest approach at 2026/09/06 04:49:04 UTC
J2000 position of star is 05:51:32.0 +29:20:29
Equinox of date position of star is 05:53:14.1 +29:20:47
Star is 10 degrees from the moon. Moon is 29% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=14.8
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 9.5 per integration for unocculted signal
Expected flux drop is 61% with SNR of 5.8 for the occulted depth (per occulted point)
Apparent velocity is 18.5 km/sec on the sky relative to the star, or, 15.4 arcsec/hr.
Position angle of asteroid motion is 84.7 degrees
The recommended exposure time corresponds to 7.4 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 34.9 km.
The sky-plane scale is 4333.2 km/arcsec.
Diameter estimates:
112.7 km assuming a 5% albedo, maximum of 6.1 sec for a central chord
46.0 km assuming a 30% albedo, maximum of 2.5 sec for a central chord
Cross-track diameter of 101.1 km used for deployment plan.
Star training set for 884_Priamus, (2026/09/06 04:49UT) Object RA Dec mag sep mel Aldebaran 04:37:27.3 +16:33:39 0.8 21.57 30 Alnath 05:27:58.9 +28:37:39 1.6 5.57 16 PPM 095117 05:58:15.5 +28:56:38 6.5 1.17 9 PPM 094916 05:50:35.5 +29:08:34 8.3 0.61 11 PPM 094992 05:53:49.1 +29:22:56 9.5 0.13 10 884_Priamus 05:53:14.1 +29:20:47 14.8 10 Positions are for equinox of date
Star training set for 884_Priamus, (2026/09/06 04:49UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 21.57 30 Alnath 05:26:17.6 +28:36:22 1.6 5.57 16 PPM 095117 05:56:33.8 +28:56:32 6.5 1.17 9 PPM 094916 05:48:53.6 +29:08:11 8.3 0.61 11 PPM 094992 05:52:07.0 +29:22:40 9.5 0.13 10 884_Priamus 05:51:32.0 +29:20:29 14.8 10 Positions are for J2000