Occultation event with (2895) Memnon, event index number 4215
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/10 08:45:42 UTC
J2000 position of star is 05:34:24.5 -01:32:34
Equinox of date position of star is 05:35:45.6 -01:31:36
Star is 76 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=15.5
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 30% with SNR of 0.9 for the occulted depth (per occulted point)
Apparent velocity is 17.4 km/sec on the sky relative to the star, or, 17.3 arcsec/hr.
Position angle of asteroid motion is 116.1 degrees
The recommended exposure time corresponds to 18.2 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 31.2 km.
The sky-plane scale is 3611.6 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 3.4 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 56.7 km used for deployment plan.
Star training set for 2895_Memnon, (2026/09/10 08:46UT) Object RA Dec mag sep mel Rigel 05:15:49.3 -08:10:22 0.1 8.30 82 34Del Ori 05:33:22.3 -00:16:53 2.2 1.38 76 PPM 175892 05:34:02.4 -01:34:29 4.9 0.43 76 PPM 175914 05:35:25.2 -01:27:15 7.8 0.11 76 2895_Memnon 05:35:45.6 -01:31:36 15.5 76 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/09/10 08:46UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 8.30 82 34Del Ori 05:32:00.4 -00:17:57 2.2 1.38 76 PPM 175892 05:32:41.3 -01:35:31 4.9 0.43 76 PPM 175914 05:34:04.0 -01:28:14 7.8 0.11 76 2895_Memnon 05:34:24.5 -01:32:34 15.5 76 Positions are for J2000