Occultation event with (9694) Lycomedes, event index number 3405
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/03/12 06:25:26 UTC
J2000 position of star is 10:58:50.4 +07:07:22
Equinox of date position of star is 11:00:12.1 +06:58:55
Star is 108 degrees from the moon. Moon is 42% illuminated.
Stellar brightness G=13.7, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.20 seconds with the standard RECON-QHY system.
SNR of 9.7 per integration for unocculted signal
Expected flux drop is 83% with SNR of 8.1 for the occulted depth (per occulted point)
Apparent velocity is 16.8 km/sec on the sky relative to the star, or, 20.1 arcsec/hr.
Position angle of asteroid motion is 108.6 degrees
The recommended exposure time corresponds to 3.4 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 27.6 km.
The sky-plane scale is 3013.0 km/arcsec.
Diameter estimates:
42.1 km assuming a 5% albedo, maximum of 2.5 sec for a central chord
17.2 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 31.7 km used for deployment plan.
Star training set for 9694_Lycomedes, (2026/03/12 06:25UT) Object RA Dec mag sep mel Regulus 10:09:45.9 +11:50:17 1.3 13.35 121 59 Leo 11:02:06.2 +05:57:36 5.1 1.13 107 PPM 157403 11:00:53.1 +07:04:40 8.4 0.19 108 PPM 157395 11:00:23.9 +06:53:09 9.9 0.11 108 9694_Lycomedes 11:00:12.1 +06:58:55 15.4 108 Positions are for equinox of date
Star training set for 9694_Lycomedes, (2026/03/12 06:25UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 13.35 121 59 Leo 11:00:44.7 +06:06:04 5.1 1.13 107 PPM 157403 10:59:31.4 +07:13:07 8.4 0.19 108 PPM 157395 10:59:02.2 +07:01:36 9.9 0.11 108 9694_Lycomedes 10:58:50.4 +07:07:22 15.4 108 Positions are for J2000