Occultation event with (2895) Memnon, event index number 3358
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/03/05 23:56:40 UTC
J2000 position of star is 03:03:25.9 -08:29:14
Equinox of date position of star is 03:04:42.7 -08:23:09
Star is 143 degrees from the moon. Moon is 93% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 48% with SNR of 1.4 for the occulted depth (per occulted point)
Apparent velocity is 31.7 km/sec on the sky relative to the star, or, 29.1 arcsec/hr.
Position angle of asteroid motion is 53.5 degrees
The recommended exposure time corresponds to 12.7 km per image.
The 1-sigma error in the time of the event is 0.8 seconds.
The 1-sigma cross-track error in the shadow position is 18.0 km.
The sky-plane scale is 3928.2 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 1.9 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 56.7 km used for deployment plan.
Star training set for 2895_Memnon, (2026/03/05 23:57UT) Object RA Dec mag sep mel Rigel 05:15:47.8 -08:10:24 0.1 32.42 112 68Omi Cet 02:20:40.3 -02:51:36 2.0 12.27 155 9Rho2Eri 03:03:59.5 -07:35:03 5.3 0.82 143 PPM 185335 03:04:26.1 -07:55:48 8.5 0.46 143 PPM 185336 03:04:28.0 -08:25:30 9.5 0.07 143 2895_Memnon 03:04:42.7 -08:23:09 15.7 143 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/03/05 23:57UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 32.42 112 68Omi Cet 02:19:20.8 -02:58:46 2.0 12.27 155 9Rho2Eri 03:02:42.4 -07:41:08 5.3 0.82 143 PPM 185335 03:03:09.1 -08:01:53 8.5 0.46 143 PPM 185336 03:03:11.3 -08:31:34 9.5 0.07 143 2895_Memnon 03:03:25.9 -08:29:14 15.7 143 Positions are for J2000