Occultation event with (2895) Memnon, event index number 5178
Regions able to see the event: US
Geocentric closest approach at 2026/12/12 00:49:01 UTC
J2000 position of star is 05:20:47.7 -05:04:29
Equinox of date position of star is 05:22:07.4 -05:02:59
Star is 136 degrees from the moon. Moon is 8% illuminated.
Stellar brightness G=14.0, apparent brightess of occulting body is G=14.9
Use an exposure time of 0.30 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 69% with SNR of 6.8 for the occulted depth (per occulted point)
Apparent velocity is 17.5 km/sec on the sky relative to the star, or, 21.2 arcsec/hr.
Position angle of asteroid motion is 98.3 degrees
The recommended exposure time corresponds to 5.3 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 31.0 km.
The sky-plane scale is 2983.9 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, (2026/12/12 00:49UT) Object RA Dec mag sep mel Rigel 05:15:50.0 -08:10:21 0.1 3.49 132 67Bet Eri 05:09:10.6 -05:03:13 2.8 3.22 133 20Tau Ori 05:18:55.0 -06:49:02 3.6 1.94 134 PPM 187950 05:21:22.8 -05:10:58 7.7 0.23 135 PPM 187983 05:22:57.8 -05:02:59 9.1 0.21 136 2895_Memnon 05:22:07.4 -05:02:59 14.9 136 Positions are for equinox of date
Star training set for 2895_Memnon, (2026/12/12 00:49UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 3.49 132 67Bet Eri 05:07:50.8 -05:05:13 2.8 3.22 133 20Tau Ori 05:17:36.4 -06:50:40 3.6 1.94 134 PPM 187950 05:20:03.1 -05:12:30 7.7 0.23 135 PPM 187983 05:21:38.1 -05:04:28 9.1 0.21 136 2895_Memnon 05:20:47.7 -05:04:29 14.9 135 Positions are for J2000