Occultation event with (5511) Cloanthus, event index number 5016
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/12/03 22:30:28 UTC
J2000 position of star is 05:42:31.0 +10:00:07
Equinox of date position of star is 05:44:00.1 +10:00:46
Star is 107 degrees from the moon. Moon is 23% illuminated.
Stellar brightness G=11.4, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 30.7 per integration for unocculted signal
Expected flux drop is 98% with SNR of 30.2 for the occulted depth (per occulted point)
Apparent velocity is 17.7 km/sec on the sky relative to the star, or, 18.2 arcsec/hr.
Position angle of asteroid motion is 83.4 degrees
The recommended exposure time corresponds to 2.1 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 28.6 km.
The sky-plane scale is 3495.0 km/arcsec.
Diameter estimates:
50.3 km assuming a 5% albedo, maximum of 2.8 sec for a central chord
20.6 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 39.8 km used for deployment plan.
Star training set for 5511_Cloanthus, (2026/12/03 22:30UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.8 +07:24:35 0.4 4.06 104 Bellatrix 05:26:34.6 +06:22:18 1.6 5.64 111 40Phi2Ori 05:38:23.2 +09:18:11 5.2 1.56 108 PPM 121326 05:45:06.6 +10:01:46 8.2 0.27 107 5511_Cloanthus 05:44:00.1 +10:00:46 15.7 107 Positions are for equinox of date
Star training set for 5511_Cloanthus, (2026/12/03 22:30UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 4.06 104 Bellatrix 05:25:07.8 +06:20:58 1.6 5.64 111 40Phi2Ori 05:36:54.6 +09:17:19 5.2 1.56 108 PPM 121326 05:43:37.5 +10:01:10 8.2 0.27 107 5511_Cloanthus 05:42:31.0 +10:00:07 15.7 107 Positions are for J2000