Occultation event with (2895) Memnon, event index number 4558
Regions able to see the event: NZ
Geocentric closest approach at 2026/11/03 11:32:51 UTC
J2000 position of star is 05:38:31.7 -04:29:56
Equinox of date position of star is 05:39:51.4 -04:29:07
Star is 70 degrees from the moon. Moon is 32% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=15.1
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
SNR of 4.5 per integration for unocculted signal
Expected flux drop is 28% with SNR of 1.3 for the occulted depth (per occulted point)
Apparent velocity is 10.7 km/sec on the sky relative to the star, or, 12.3 arcsec/hr.
Position angle of asteroid motion is 58.0 degrees
The recommended exposure time corresponds to 13.9 km per image.
The 1-sigma error in the time of the event is 2.3 seconds.
The 1-sigma cross-track error in the shadow position is 19.2 km.
The sky-plane scale is 3119.7 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 5.5 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 2.2 sec for a central chord
Cross-track diameter of 56.7 km used for deployment plan.
Star training set for 2895_Memnon, (2026/11/03 11:33UT) Object RA Dec mag sep mel Rigel 05:15:49.7 -08:10:21 0.1 7.02 77 34Del Ori 05:33:22.8 -00:16:53 2.2 4.50 71 PPM 188280 05:39:12.9 -04:48:00 6.4 0.35 70 PPM 188316 05:40:36.7 -04:40:19 8.1 0.26 70 PPM 188300 05:39:59.1 -04:40:01 9.5 0.18 70 2895_Memnon 05:39:51.4 -04:29:07 15.1 70 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/11/03 11:33UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 7.02 77 34Del Ori 05:32:00.4 -00:17:57 2.2 4.50 71 PPM 188280 05:37:53.4 -04:48:51 6.4 0.35 70 PPM 188316 05:39:17.1 -04:41:06 8.1 0.26 70 PPM 188300 05:38:39.5 -04:40:49 9.5 0.18 70 2895_Memnon 05:38:31.7 -04:29:56 15.1 70 Positions are for J2000