Occultation event with (884) Priamus, event index number 5101
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/12/07 20:24:23 UTC
J2000 position of star is 05:43:27.1 +29:49:43
Equinox of date position of star is 05:45:10.5 +29:50:20
Star is 156 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=13.9
Use an exposure time of 1.35 seconds with the standard RECON-QHY system.
SNR of 4.9 per integration for unocculted signal
Expected flux drop is 15% with SNR of 0.7 for the occulted depth (per occulted point)
Apparent velocity is 18.3 km/sec on the sky relative to the star, or, 18.7 arcsec/hr.
Position angle of asteroid motion is 85.7 degrees
The recommended exposure time corresponds to 24.7 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 33.9 km.
The sky-plane scale is 3525.4 km/arcsec.
Diameter estimates:
112.7 km assuming a 5% albedo, maximum of 6.2 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, (2026/12/07 20:24UT) Object RA Dec mag sep mel Aldebaran 04:37:28.2 +16:33:40 0.8 20.41 167 Alnath 05:27:59.8 +28:37:39 1.6 3.94 160 PPM 094619 05:41:01.1 +29:13:41 5.9 1.09 157 PPM 094718 05:44:12.4 +29:51:39 8.0 0.21 157 PPM 094751 05:45:20.2 +29:45:47 9.1 0.08 156 884_Priamus 05:45:10.5 +29:50:20 13.9 156 Positions are for equinox of date
Star training set for 884_Priamus, (2026/12/07 20:24UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 20.41 167 Alnath 05:26:17.6 +28:36:22 1.6 3.94 160 PPM 094619 05:39:18.3 +29:12:54 5.9 1.09 157 PPM 094718 05:42:29.0 +29:51:00 8.0 0.21 157 PPM 094751 05:43:36.8 +29:45:11 9.1 0.08 156 884_Priamus 05:43:27.1 +29:49:43 13.9 156 Positions are for J2000