Occultation event with (2895) Memnon, event index number 4263
Regions able to see the event: Europe
Geocentric closest approach at 2026/09/19 01:44:13 UTC
J2000 position of star is 05:37:35.5 -02:00:17
Equinox of date position of star is 05:38:56.4 -01:59:26
Star is 150 degrees from the moon. Moon is 52% illuminated.
Stellar brightness G=16.7, apparent brightess of occulting body is G=15.5
Use an exposure time of 1.35 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 25% with SNR of 0.8 for the occulted depth (per occulted point)
Apparent velocity is 14.1 km/sec on the sky relative to the star, or, 14.4 arcsec/hr.
Position angle of asteroid motion is 125.0 degrees
The recommended exposure time corresponds to 19.0 km per image.
The 1-sigma error in the time of the event is 0.6 seconds.
The 1-sigma cross-track error in the shadow position is 30.6 km.
The sky-plane scale is 3524.1 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 4.2 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 56.7 km used for deployment plan.
Star training set for 2895_Memnon, (2026/09/19 01:44UT) Object RA Dec mag sep mel Rigel 05:15:49.4 -08:10:22 0.1 8.45 143 34Del Ori 05:33:22.4 -00:16:53 2.2 2.20 151 PPM 175892 05:34:02.5 -01:34:29 4.9 1.29 150 PPM 175952 05:37:51.5 -01:58:07 8.3 0.27 150 PPM 175965 05:38:44.2 -02:04:10 8.7 0.09 150 PPM 175962 05:38:39.3 -01:58:50 11.7 0.07 150 2895_Memnon 05:38:56.4 -01:59:26 15.5 150 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/09/19 01:44UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 8.45 143 34Del Ori 05:32:00.4 -00:17:57 2.2 2.20 151 PPM 175892 05:32:41.3 -01:35:31 4.9 1.29 150 PPM 175952 05:36:30.6 -01:59:01 8.3 0.27 150 PPM 175965 05:37:23.3 -02:05:01 8.7 0.09 150 PPM 175962 05:37:18.4 -01:59:41 11.7 0.07 150 2895_Memnon 05:37:35.5 -02:00:17 15.5 150 Positions are for J2000