Occultation event with (2895) Memnon, event index number 3980
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/08/11 07:47:04 UTC
J2000 position of star is 05:17:35.2 -00:20:33
Equinox of date position of star is 05:18:56.9 -00:18:57
Star is 48 degrees from the moon. Moon is 3% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.95 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 33% with SNR of 1.0 for the occulted depth (per occulted point)
Apparent velocity is 28.2 km/sec on the sky relative to the star, or, 26.1 arcsec/hr.
Position angle of asteroid motion is 99.1 degrees
The recommended exposure time corresponds to 26.8 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 30.4 km.
The sky-plane scale is 3897.5 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 2.1 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 56.7 km used for deployment plan.
Star training set for 2895_Memnon, (2026/08/11 07:47UT) Object RA Dec mag sep mel Rigel 05:15:49.1 -08:10:22 0.1 7.90 53 34Del Ori 05:33:22.0 -00:16:54 2.2 3.61 45 PPM 175816 05:25:04.0 -00:08:13 5.3 1.54 46 PPM 175791 05:19:22.8 -00:00:39 7.4 0.32 47 PPM 175789 05:19:16.7 -00:15:26 9.0 0.10 48 2895_Memnon 05:18:56.9 -00:18:57 15.7 47 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/08/11 07:47UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 7.90 53 34Del Ori 05:32:00.4 -00:17:57 2.2 3.61 45 PPM 175816 05:23:42.3 -00:09:36 5.3 1.54 46 PPM 175791 05:18:00.9 -00:02:15 7.4 0.32 47 PPM 175789 05:17:55.0 -00:17:02 9.0 0.10 48 2895_Memnon 05:17:35.2 -00:20:33 15.7 48 Positions are for J2000