Occultation event with (2895) Memnon, event index number 4220
Regions able to see the event: Australia
Geocentric closest approach at 2026/09/10 19:48:14 UTC
J2000 position of star is 05:34:35.9 -01:33:57
Equinox of date position of star is 05:35:57.0 -01:32:59
Star is 81 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=11.8, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 24.7 per integration for unocculted signal
Expected flux drop is 97% with SNR of 24.0 for the occulted depth (per occulted point)
Apparent velocity is 17.2 km/sec on the sky relative to the star, or, 17.2 arcsec/hr.
Position angle of asteroid motion is 116.5 degrees
The recommended exposure time corresponds to 2.1 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 30.9 km.
The sky-plane scale is 3607.0 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 19:48UT) Object RA Dec mag sep mel Rigel 05:15:49.3 -08:10:22 0.1 8.31 87 34Del Ori 05:33:22.3 -00:16:53 2.2 1.42 82 PPM 175892 05:34:02.4 -01:34:29 4.9 0.48 82 PPM 175914 05:35:25.2 -01:27:15 7.8 0.16 81 2895_Memnon 05:35:57.0 -01:32:59 15.5 81 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/09/10 19:48UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 8.31 87 34Del Ori 05:32:00.4 -00:17:57 2.2 1.42 82 PPM 175892 05:32:41.3 -01:35:31 4.9 0.48 82 PPM 175914 05:34:04.0 -01:28:14 7.8 0.16 81 2895_Memnon 05:34:35.9 -01:33:57 15.5 81 Positions are for J2000