Occultation event with (884) Priamus, event index number 4329
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/30 09:17:36 UTC
J2000 position of star is 05:59:41.2 +29:34:09
Equinox of date position of star is 06:01:23.7 +29:34:08
Star is 35 degrees from the moon. Moon is 83% illuminated.
Stellar brightness G=15.4, apparent brightess of occulting body is G=14.7
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 33% with SNR of 3.2 for the occulted depth (per occulted point)
Apparent velocity is 7.4 km/sec on the sky relative to the star, or, 6.5 arcsec/hr.
Position angle of asteroid motion is 77.5 degrees
The recommended exposure time corresponds to 14.7 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 34.3 km.
The sky-plane scale is 4062.4 km/arcsec.
Diameter estimates:
112.7 km assuming a 5% albedo, maximum of 15.3 sec for a central chord
46.0 km assuming a 30% albedo, maximum of 6.3 sec for a central chord
Cross-track diameter of 101.1 km used for deployment plan.
Star training set for 884_Priamus, (2026/09/30 09:18UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.2 +07:24:35 0.4 22.19 39 Alnath 05:27:59.1 +28:37:39 1.6 7.36 27 PPM 095117 05:58:15.8 +28:56:38 6.5 0.93 34 PPM 095161 06:00:06.7 +29:37:39 8.2 0.29 34 PPM 095208 06:01:54.1 +29:25:07 9.9 0.19 35 884_Priamus 06:01:23.7 +29:34:08 14.7 35 Positions are for equinox of date
Star training set for 884_Priamus, (2026/09/30 09:18UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 22.19 39 Alnath 05:26:17.6 +28:36:22 1.6 7.36 27 PPM 095117 05:56:33.8 +28:56:32 6.5 0.93 34 PPM 095161 05:58:24.1 +29:37:37 8.2 0.29 34 PPM 095208 06:00:11.7 +29:25:10 9.9 0.19 35 884_Priamus 05:59:41.2 +29:34:09 14.7 35 Positions are for J2000