Occultation event with (884) Priamus, event index number 5196
Regions able to see the event: SMexico
Geocentric closest approach at 2026/12/13 01:52:30 UTC
J2000 position of star is 05:40:25.3 +29:46:17
Equinox of date position of star is 05:42:08.7 +29:47:01
Star is 141 degrees from the moon. Moon is 14% 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 14% with SNR of 0.7 for the occulted depth (per occulted point)
Apparent velocity is 18.7 km/sec on the sky relative to the star, or, 19.1 arcsec/hr.
Position angle of asteroid motion is 84.4 degrees
The recommended exposure time corresponds to 25.3 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 35.5 km.
The sky-plane scale is 3518.0 km/arcsec.
Diameter estimates:
112.7 km assuming a 5% albedo, maximum of 6.0 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, (2026/12/13 01:53UT) Object RA Dec mag sep mel Aldebaran 04:37:28.2 +16:33:41 0.8 19.85 125 Alnath 05:27:59.9 +28:37:39 1.6 3.30 138 PPM 094619 05:41:01.2 +29:13:41 5.9 0.61 141 PPM 094672 05:43:04.7 +29:30:21 7.8 0.34 141 PPM 094623 05:41:13.2 +29:50:47 9.8 0.21 141 884_Priamus 05:42:08.7 +29:47:01 13.9 141 Positions are for equinox of date
Star training set for 884_Priamus, (2026/12/13 01:53UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 19.85 125 Alnath 05:26:17.6 +28:36:22 1.6 3.30 138 PPM 094619 05:39:18.3 +29:12:54 5.9 0.61 141 PPM 094672 05:41:21.5 +29:29:39 7.8 0.34 141 PPM 094623 05:39:29.8 +29:50:01 9.8 0.21 141 884_Priamus 05:40:25.3 +29:46:17 13.9 141 Positions are for J2000