Occultation event with (5511) Cloanthus, event index number 4997
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/12/02 23:36:13 UTC
J2000 position of star is 05:42:59.0 +10:00:55
Equinox of date position of star is 05:44:28.1 +10:01:33
Star is 95 degrees from the moon. Moon is 32% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 39% with SNR of 1.2 for the occulted depth (per occulted point)
Apparent velocity is 17.6 km/sec on the sky relative to the star, or, 18.1 arcsec/hr.
Position angle of asteroid motion is 83.0 degrees
The recommended exposure time corresponds to 13.2 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 29.0 km.
The sky-plane scale is 3497.4 km/arcsec.
Diameter estimates:
50.3 km assuming a 5% albedo, maximum of 2.9 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, (2026/12/02 23:36UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.8 +07:24:35 0.4 3.98 92 Bellatrix 05:26:34.6 +06:22:18 1.6 5.74 100 40Phi2Ori 05:38:23.2 +09:18:11 5.2 1.66 97 PPM 121326 05:45:06.6 +10:01:46 8.2 0.16 95 5511_Cloanthus 05:44:28.1 +10:01:33 15.7 95 Positions are for equinox of date
Star training set for 5511_Cloanthus, (2026/12/02 23:36UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 3.98 92 Bellatrix 05:25:07.8 +06:20:58 1.6 5.74 100 40Phi2Ori 05:36:54.6 +09:17:19 5.2 1.66 97 PPM 121326 05:43:37.5 +10:01:10 8.2 0.16 95 5511_Cloanthus 05:42:59.0 +10:00:55 15.7 95 Positions are for J2000