Occultation event with (9694) Lycomedes, event index number 3501
Regions able to see the event: SAmericaN,SAfrica
Geocentric closest approach at 2026/03/25 22:57:43 UTC
J2000 position of star is 10:52:14.4 +07:39:39
Equinox of date position of star is 10:53:36.4 +07:31:15
Star is 64 degrees from the moon. Moon is 52% illuminated.
Stellar brightness G=15.2, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 5.7 per integration for unocculted signal
Expected flux drop is 61% with SNR of 3.5 for the occulted depth (per occulted point)
Apparent velocity is 14.7 km/sec on the sky relative to the star, or, 17.3 arcsec/hr.
Position angle of asteroid motion is 107.7 degrees
The recommended exposure time corresponds to 7.3 km per image.
The 1-sigma error in the time of the event is 1.9 seconds.
The 1-sigma cross-track error in the shadow position is 27.7 km.
The sky-plane scale is 3055.5 km/arcsec.
Diameter estimates:
42.1 km assuming a 5% albedo, maximum of 2.9 sec for a central chord
17.2 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 31.7 km used for deployment plan.
Star training set for 9694_Lycomedes, (2026/03/25 22:58UT) Object RA Dec mag sep mel Regulus 10:09:46.0 +11:50:17 1.3 11.63 53 PPM 157166 10:47:27.5 +06:14:03 6.4 2.00 63 PPM 157294 10:53:47.6 +08:04:27 8.3 0.56 64 PPM 157274 10:52:50.4 +07:47:43 8.7 0.33 64 9694_Lycomedes 10:53:36.4 +07:31:15 15.7 65 Positions are for equinox of date
Star training set for 9694_Lycomedes, (2026/03/25 22:58UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 11.63 53 PPM 157166 10:46:05.7 +06:22:22 6.4 2.00 63 PPM 157294 10:52:25.5 +08:12:51 8.3 0.56 64 PPM 157274 10:51:28.3 +07:56:06 8.7 0.33 64 9694_Lycomedes 10:52:14.4 +07:39:39 15.7 64 Positions are for J2000