Occultation event with (884) Priamus, event index number 645
Regions able to see the event: UAE
Geocentric closest approach at 2025/02/16 16:24:03 UTC
J2000 position of star is 01:36:45.5 +18:54:14
Equinox of date position of star is 01:38:07.5 +19:01:53
Star is 164 degrees from the moon. Moon is 85% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=14.6
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
Expected flux drop is 70% with SNR of 6.0 per integration
Apparent velocity is 26.8 km/sec on the sky relative to the star, or, 22.7 arcsec/hr.
The recommended exposure time corresponds to 26.8 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 17.1 km.
The sky-plane scale is 4250.4 km/arcsec.
Diameter estimates:
111.7 km assuming a 5% albedo, aximum of 4.2 sec for a central chord
45.6 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 111.7 km used for deployment plan.
Star training set for 884_Priamus, (2025/02/16 16:24UT) Object RA Dec mag sep mel Aldebaran 04:37:21.9 +16:33:28 0.8 42.63 124 6Bet Ari 01:56:02.0 +20:55:47 2.6 4.62 159 PPM 117485 01:37:16.7 +17:33:41 6.0 1.48 165 PPM 117470 01:36:11.0 +18:35:17 7.4 0.64 164 884_Priamus 01:38:07.5 +19:01:53 14.6 163 Positions are for equinox of date
Star training set for 884_Priamus, (2025/02/16 16:24UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 42.63 124 6Bet Ari 01:54:38.6 +20:48:26 2.6 4.62 159 PPM 117485 01:35:55.1 +17:26:02 6.0 1.48 165 PPM 117470 01:34:49.2 +18:27:36 7.4 0.64 164 884_Priamus 01:36:45.5 +18:54:14 14.6 164 Positions are for J2000