Occultation event with (2895) Memnon, event index number 3952
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/08/07 03:12:10 UTC
J2000 position of star is 05:14:38.8 -00:14:10
Equinox of date position of star is 05:16:00.4 -00:12:27
Star is 34 degrees from the moon. Moon is 38% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 37% with SNR of 1.2 for the occulted depth (per occulted point)
Apparent velocity is 29.6 km/sec on the sky relative to the star, or, 27.1 arcsec/hr.
Position angle of asteroid motion is 97.4 degrees
The recommended exposure time corresponds to 22.2 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 30.8 km.
The sky-plane scale is 3933.4 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 2.0 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 56.7 km used for deployment plan.
Star training set for 2895_Memnon, (2026/08/07 03:12UT) Object RA Dec mag sep mel Rigel 05:15:49.0 -08:10:22 0.1 7.97 40 34Del Ori 05:33:22.0 -00:16:54 2.2 4.34 37 PPM 148621 05:14:54.5 +01:59:49 6.4 2.22 32 PPM 175772 05:15:58.4 -00:32:04 8.2 0.33 34 2895_Memnon 05:16:00.4 -00:12:27 15.7 34 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/08/07 03:12UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 7.97 40 34Del Ori 05:32:00.4 -00:17:57 2.2 4.34 37 PPM 148621 05:13:31.5 +01:58:03 6.4 2.22 32 PPM 175772 05:14:36.9 -00:33:47 8.2 0.33 34 2895_Memnon 05:14:38.8 -00:14:10 15.7 34 Positions are for J2000