Occultation event with (911) Agamemnon, event index number 1580
Regions able to see the event: Australia
Geocentric closest approach at 2025/11/24 19:16:22 UTC
J2000 position of star is 11:49:26.2 -03:29:12
Equinox of date position of star is 11:50:45.7 -03:37:51
Star is 113 degrees from the moon. Moon is 18% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=13.8
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 8.1 per integration for unocculted signal
Expected flux drop is 22% with SNR of 1.8 for the occulted depth (per occulted point)
Apparent velocity is 25.6 km/sec on the sky relative to the star, or, 22.1 arcsec/hr.
Position angle of asteroid motion is 128.1 degrees
The recommended exposure time corresponds to 32.0 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 5.0 km.
The sky-plane scale is 4172.3 km/arcsec.
Diameter estimates:
160.7 km assuming a 5% albedo, aximum of 6.3 sec for a central chord
65.6 km assuming a 30% albedo, maximum of 2.6 sec for a central chord
Cross-track diameter of 131.0 km used for deployment plan.
Star training set for 911_Agamemnon, (2025/11/24 19:16UT) Object RA Dec mag sep mel Spica 13:26:33.7 -11:17:44 1.0 24.93 88 4Gam Crv 12:17:08.5 -17:41:08 2.6 15.47 100 PPM 194890 11:52:21.8 -05:28:39 5.6 1.89 112 PPM 194858 11:50:36.3 -03:27:25 8.4 0.18 113 PPM 194861 11:50:49.8 -03:35:11 10.1 0.05 113 911_Agamemnon 11:50:45.7 -03:37:51 13.8 113 Positions are for equinox of date
Star training set for 911_Agamemnon, (2025/11/24 19:16UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 24.93 88 4Gam Crv 12:15:48.1 -17:32:30 2.6 15.47 100 PPM 194890 11:51:02.2 -05:20:00 5.6 1.89 112 PPM 194858 11:49:16.8 -03:18:47 8.4 0.18 113 PPM 194861 11:49:30.3 -03:26:33 10.1 0.05 113 911_Agamemnon 11:49:26.2 -03:29:12 13.8 113 Positions are for J2000