Occultation event with (911) Agamemnon, event index number 3406
Regions able to see the event: NZ
Geocentric closest approach at 2026/03/12 08:15:12 UTC
J2000 position of star is 11:40:19.0 -07:51:35
Equinox of date position of star is 11:41:39.1 -08:00:18
Star is 93 degrees from the moon. Moon is 41% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=12.8
Use an exposure time of 1.75 seconds with the standard RECON-QHY system.
SNR of 8.6 per integration for unocculted signal
Expected flux drop is 12% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 18.6 km/sec on the sky relative to the star, or, 20.7 arcsec/hr.
Position angle of asteroid motion is 98.0 degrees
The recommended exposure time corresponds to 32.5 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 22.9 km.
The sky-plane scale is 3233.2 km/arcsec.
Diameter estimates:
160.7 km assuming a 5% albedo, maximum of 8.6 sec for a central chord
65.6 km assuming a 30% albedo, maximum of 3.5 sec for a central chord
Cross-track diameter of 131.0 km used for deployment plan.
Star training set for 911_Agamemnon, (2026/03/12 08:15UT) Object RA Dec mag sep mel Spica 13:26:34.6 -11:17:50 1.0 26.06 68 4Gam Crv 12:17:09.4 -17:41:14 2.6 12.98 80 PPM 194769 11:45:15.5 -06:49:23 6.1 1.48 92 PPM 194671 11:40:09.5 -07:44:43 8.4 0.45 93 PPM 194696 11:41:31.5 -08:00:44 9.8 0.03 93 911_Agamemnon 11:41:39.1 -08:00:18 12.8 92 Positions are for equinox of date
Star training set for 911_Agamemnon, (2026/03/12 08:15UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 26.06 68 4Gam Crv 12:15:48.1 -17:32:30 2.6 12.98 80 PPM 194769 11:43:55.2 -06:40:39 6.1 1.48 92 PPM 194671 11:38:49.4 -07:36:00 8.4 0.45 93 PPM 194696 11:40:11.4 -07:52:01 9.8 0.03 93 911_Agamemnon 11:40:19.0 -07:51:35 12.8 93 Positions are for J2000