Occultation event with (4792) Lykaon, event index number 434
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/01/15 22:44:54 UTC
J2000 position of star is 00:02:29.5 -07:21:40
Equinox of date position of star is 00:03:46.5 -07:13:18
Star is 143 degrees from the moon. Moon is 95% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
Expected flux drop is 42% with SNR of 4.8 per integration
Apparent velocity is 28.4 km/sec on the sky relative to the star, or, 27.3 arcsec/hr.
The recommended exposure time corresponds to 12.8 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 24.9 km.
The sky-plane scale is 3751.6 km/arcsec.
Diameter estimates:
55.0 km assuming a 5% albedo, aximum of 1.9 sec for a central chord
22.4 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 55.0 km used for deployment plan.
Star training set for 4792_Lykaon, (2025/01/15 22:45UT) Object RA Dec mag sep mel Fomalhaut 22:59:01.7 -29:29:20 1.2 26.98 158 Diphda 00:44:50.7 -17:50:58 2.0 14.60 135 30 Psc 00:03:14.7 -05:52:30 4.4 1.35 142 PPM 181837 00:06:45.2 -07:31:35 7.1 0.80 142 PPM 181786 00:03:58.6 -06:55:31 9.6 0.30 143 4792_Lykaon 00:03:46.5 -07:13:18 15.6 142 Positions are for equinox of date
Star training set for 4792_Lykaon, (2025/01/15 22:45UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.7 -29:37:24 1.2 26.98 158 Diphda 00:43:35.8 -17:59:11 2.0 14.60 135 30 Psc 00:01:57.7 -06:00:52 4.4 1.35 142 PPM 181837 00:05:28.3 -07:39:57 7.1 0.80 142 PPM 181786 00:02:41.6 -07:03:52 9.6 0.30 143 4792_Lykaon 00:02:29.5 -07:21:40 15.6 143 Positions are for J2000