Occultation event with (2456) Palamedes, event index number 3598
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/04/08 07:12:50 UTC
J2000 position of star is 11:49:07.5 -10:12:04
Equinox of date position of star is 11:50:28.0 -10:20:50
Star is 85 degrees from the moon. Moon is 68% illuminated.
Stellar brightness G=11.7, apparent brightess of occulting body is G=14.2
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 24.6 per integration for unocculted signal
Expected flux drop is 91% with SNR of 22.3 for the occulted depth (per occulted point)
Apparent velocity is 16.3 km/sec on the sky relative to the star, or, 18.5 arcsec/hr.
Position angle of asteroid motion is 110.0 degrees
The recommended exposure time corresponds to 2.0 km per image.
The 1-sigma error in the time of the event is 1.9 seconds.
The 1-sigma cross-track error in the shadow position is 21.0 km.
The sky-plane scale is 3162.7 km/arcsec.
Diameter estimates:
85.5 km assuming a 5% albedo, maximum of 5.3 sec for a central chord
34.9 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 65.9 km used for deployment plan.
Star training set for 2456_Palamedes, (2026/04/08 07:13UT) Object RA Dec mag sep mel Spica 13:26:34.8 -11:17:51 1.0 23.61 64 4Gam Crv 12:17:09.7 -17:41:15 2.6 9.78 76 PPM 225013 11:52:42.0 -12:20:01 6.3 2.06 84 PPM 194843 11:49:51.3 -09:31:19 8.1 0.84 86 PPM 224936 11:49:45.0 -10:19:21 9.5 0.18 85 2456_Palamedes 11:50:28.0 -10:20:50 14.2 85 Positions are for equinox of date
Star training set for 2456_Palamedes, (2026/04/08 07:13UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 23.61 64 4Gam Crv 12:15:48.1 -17:32:30 2.6 9.78 76 PPM 225013 11:51:21.5 -12:11:15 6.3 2.06 84 PPM 194843 11:48:30.8 -09:22:33 8.1 0.84 86 PPM 224936 11:48:24.5 -10:10:36 9.5 0.18 85 2456_Palamedes 11:49:07.5 -10:12:04 14.2 85 Positions are for J2000