Occultation event with (911) Agamemnon, event index number 3519
Regions able to see the event: Australia
Geocentric closest approach at 2026/03/27 13:58:23 UTC
J2000 position of star is 11:31:58.9 -07:29:23
Equinox of date position of star is 11:33:19.0 -07:38:05
Star is 58 degrees from the moon. Moon is 70% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=12.9
Use an exposure time of 1.80 seconds with the standard RECON-QHY system.
SNR of 7.5 per integration for unocculted signal
Expected flux drop is 11% with SNR of 0.8 for the occulted depth (per occulted point)
Apparent velocity is 18.1 km/sec on the sky relative to the star, or, 20.1 arcsec/hr.
Position angle of asteroid motion is 102.1 degrees
The recommended exposure time corresponds to 32.5 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 20.2 km.
The sky-plane scale is 3240.1 km/arcsec.
Diameter estimates:
160.7 km assuming a 5% albedo, maximum of 8.9 sec for a central chord
65.6 km assuming a 30% albedo, maximum of 3.6 sec for a central chord
Cross-track diameter of 131.0 km used for deployment plan.
Star training set for 911_Agamemnon, (2026/03/27 13:58UT) Object RA Dec mag sep mel Spica 13:26:34.7 -11:17:51 1.0 28.16 84 4Gam Crv 12:17:09.6 -17:41:15 2.6 14.67 72 PPM 194572 11:34:07.6 -07:58:21 5.8 0.39 58 PPM 194544 11:32:11.3 -06:51:50 8.0 0.82 57 PPM 194556 11:33:20.2 -07:38:31 9.5 0.01 58 911_Agamemnon 11:33:19.0 -07:38:05 12.9 58 Positions are for equinox of date
Star training set for 911_Agamemnon, (2026/03/27 13:58UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 28.16 84 4Gam Crv 12:15:48.1 -17:32:30 2.6 14.67 72 PPM 194572 11:32:47.5 -07:49:39 5.8 0.39 58 PPM 194544 11:30:51.1 -06:43:08 8.0 0.82 57 PPM 194556 11:32:00.0 -07:29:49 9.5 0.01 58 911_Agamemnon 11:31:58.9 -07:29:23 12.9 58 Positions are for J2000