Occultation event with (2456) Palamedes, event index number 3199
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/02/02 02:14:57 UTC
J2000 position of star is 12:17:40.9 -11:11:49
Equinox of date position of star is 12:19:01.7 -11:20:30
Star is 54 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=12.5, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 15.7 per integration for unocculted signal
Expected flux drop is 88% with SNR of 13.8 for the occulted depth (per occulted point)
Apparent velocity is 7.6 km/sec on the sky relative to the star, or, 8.0 arcsec/hr.
Position angle of asteroid motion is 61.1 degrees
The recommended exposure time corresponds to 0.9 km per image.
The 1-sigma error in the time of the event is 0.5 seconds.
The 1-sigma cross-track error in the shadow position is 37.4 km.
The sky-plane scale is 3386.5 km/arcsec.
Diameter estimates:
85.5 km assuming a 5% albedo, maximum of 11.3 sec for a central chord
34.9 km assuming a 30% albedo, maximum of 4.6 sec for a central chord
Cross-track diameter of 65.9 km used for deployment plan.
Star training set for 2456_Palamedes, (2026/02/02 02:15UT) Object RA Dec mag sep mel Spica 13:26:34.3 -11:17:48 1.0 16.56 68 4Gam Crv 12:17:09.1 -17:41:12 2.6 6.36 57 PPM 225575 12:16:31.3 -10:27:53 6.1 1.07 53 PPM 225600 12:17:34.8 -12:09:56 8.5 0.90 54 PPM 225634 12:19:03.8 -11:17:14 9.5 0.06 54 2456_Palamedes 12:19:01.7 -11:20:30 14.6 54 Positions are for equinox of date
Star training set for 2456_Palamedes, (2026/02/02 02:15UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 16.56 68 4Gam Crv 12:15:48.1 -17:32:30 2.6 6.36 57 PPM 225575 12:15:10.6 -10:19:11 6.1 1.07 53 PPM 225600 12:16:14.1 -12:01:15 8.5 0.90 54 PPM 225634 12:17:43.0 -11:08:33 9.5 0.06 54 2456_Palamedes 12:17:40.9 -11:11:49 14.6 54 Positions are for J2000