Occultation event with (2895) Memnon, event index number 4178
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/09/05 00:47:04 UTC
J2000 position of star is 05:32:02.7 -01:16:48
Equinox of date position of star is 05:33:23.9 -01:15:45
Star is 29 degrees from the moon. Moon is 42% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.70 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 37% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 19.4 km/sec on the sky relative to the star, or, 19.1 arcsec/hr.
Position angle of asteroid motion is 111.9 degrees
The recommended exposure time corresponds to 13.6 km per image.
The 1-sigma error in the time of the event is 0.1 seconds.
The 1-sigma cross-track error in the shadow position is 31.7 km.
The sky-plane scale is 3664.8 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 3.0 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 56.7 km used for deployment plan.
Star training set for 2895_Memnon, (2026/09/05 00:47UT) Object RA Dec mag sep mel Rigel 05:15:49.3 -08:10:22 0.1 8.18 36 34Del Ori 05:33:22.3 -00:16:53 2.2 0.98 28 PPM 175892 05:34:02.4 -01:34:29 4.9 0.35 30 PPM 175897 05:34:24.9 -01:13:27 8.1 0.26 29 PPM 175886 05:33:01.8 -01:06:29 8.9 0.18 29 2895_Memnon 05:33:23.9 -01:15:45 15.6 29 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/09/05 00:47UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 8.18 36 34Del Ori 05:32:00.4 -00:17:57 2.2 0.98 28 PPM 175892 05:32:41.3 -01:35:31 4.9 0.35 30 PPM 175897 05:33:03.7 -01:14:28 8.1 0.26 29 PPM 175886 05:31:40.5 -01:07:33 8.9 0.18 29 2895_Memnon 05:32:02.7 -01:16:48 15.6 29 Positions are for J2000