Occultation event with (4792) Lykaon, event index number 1594
Regions able to see the event: Australia
Geocentric closest approach at 2025/11/26 12:14:31 UTC
J2000 position of star is 02:05:44.8 +07:51:14
Equinox of date position of star is 02:07:06.9 +07:58:36
Star is 78 degrees from the moon. Moon is 32% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=15.0
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
SNR of 4.6 per integration for unocculted signal
Expected flux drop is 30% with SNR of 1.4 for the occulted depth (per occulted point)
Apparent velocity is 12.1 km/sec on the sky relative to the star, or, 14.9 arcsec/hr.
Position angle of asteroid motion is 85.6 degrees
The recommended exposure time corresponds to 12.1 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 28.1 km.
The sky-plane scale is 2944.3 km/arcsec.
Diameter estimates:
55.2 km assuming a 5% albedo, aximum of 4.5 sec for a central chord
22.5 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 50.9 km used for deployment plan.
Star training set for 4792_Lykaon, (2025/11/26 12:15UT) Object RA Dec mag sep mel Aldebaran 04:37:24.6 +16:33:33 0.8 37.64 116 68Omi Cet 02:20:39.4 -02:51:41 2.0 11.35 78 65Xi 1Cet 02:14:22.6 +08:58:01 4.4 2.05 80 PPM 145273 02:06:13.2 +07:51:31 8.1 0.25 78 PPM 145288 02:07:51.4 +07:50:13 9.9 0.23 79 PPM 145277 02:07:01.9 +08:07:32 10.8 0.15 78 4792_Lykaon 02:07:06.9 +07:58:36 15.0 79 Positions are for equinox of date
Star training set for 4792_Lykaon, (2025/11/26 12:15UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 37.64 116 68Omi Cet 02:19:20.8 -02:58:46 2.0 11.35 78 65Xi 1Cet 02:13:00.0 +08:50:48 4.4 2.05 80 PPM 145273 02:04:51.1 +07:44:07 8.1 0.25 78 PPM 145288 02:06:29.2 +07:42:52 9.9 0.23 79 PPM 145277 02:05:39.7 +08:00:09 10.8 0.15 78 4792_Lykaon 02:05:44.8 +07:51:14 15.0 78 Positions are for J2000