Occultation event with (2895) Memnon, event index number 4506
Regions able to see the event: Australia
Geocentric closest approach at 2026/10/28 19:24:40 UTC
J2000 position of star is 05:39:54.7 -04:14:08
Equinox of date position of star is 05:41:14.5 -04:13:22
Star is 35 degrees from the moon. Moon is 90% illuminated.
Stellar brightness G=12.9, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 11.7 per integration for unocculted signal
Expected flux drop is 89% with SNR of 10.4 for the occulted depth (per occulted point)
Apparent velocity is 9.4 km/sec on the sky relative to the star, or, 10.7 arcsec/hr.
Position angle of asteroid motion is 46.6 degrees
The recommended exposure time corresponds to 1.1 km per image.
The 1-sigma error in the time of the event is 3.0 seconds.
The 1-sigma cross-track error in the shadow position is 14.2 km.
The sky-plane scale is 3160.3 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 6.3 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 2.6 sec for a central chord
Cross-track diameter of 56.7 km used for deployment plan.
Star training set for 2895_Memnon, (2026/10/28 19:25UT) Object RA Dec mag sep mel Rigel 05:15:49.7 -08:10:22 0.1 7.45 36 34Del Ori 05:33:22.7 -00:16:53 2.2 4.40 30 PPM 188321 05:40:51.4 -03:33:07 6.3 0.68 34 PPM 188286 05:39:35.2 -04:05:41 7.0 0.43 35 PPM 188336 05:41:49.0 -04:20:34 9.4 0.19 35 2895_Memnon 05:41:14.5 -04:13:22 15.2 35 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/10/28 19:25UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 7.45 36 34Del Ori 05:32:00.4 -00:17:57 2.2 4.40 30 PPM 188321 05:39:31.2 -03:33:53 6.3 0.68 34 PPM 188286 05:38:15.3 -04:06:30 7.0 0.43 35 PPM 188336 05:40:29.2 -04:21:18 9.4 0.19 35 2895_Memnon 05:39:54.7 -04:14:08 15.2 35 Positions are for J2000