Occultation event with (5511) Cloanthus, event index number 4843
Regions able to see the event: Europe
Geocentric closest approach at 2026/11/24 02:26:54 UTC
J2000 position of star is 05:47:04.5 +10:10:19
Equinox of date position of star is 05:48:33.7 +10:10:48
Star is 37 degrees from the moon. Moon is 99% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 4.3 per integration for unocculted signal
Expected flux drop is 54% with SNR of 2.3 for the occulted depth (per occulted point)
Apparent velocity is 15.9 km/sec on the sky relative to the star, or, 16.2 arcsec/hr.
Position angle of asteroid motion is 79.1 degrees
The recommended exposure time corresponds to 9.6 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 28.8 km.
The sky-plane scale is 3528.6 km/arcsec.
Diameter estimates:
50.3 km assuming a 5% albedo, maximum of 3.2 sec for a central chord
20.6 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 39.8 km used for deployment plan.
Star training set for 5511_Cloanthus, (2026/11/24 02:27UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.7 +07:24:35 0.4 3.41 40 Bellatrix 05:26:34.5 +06:22:18 1.6 6.64 34 PPM 149523 05:51:31.6 +09:52:37 6.4 0.79 38 PPM 149440 05:48:18.6 +09:40:15 8.4 0.51 37 PPM 121373 05:47:35.3 +10:06:38 8.6 0.25 37 PPM 121409 05:49:31.2 +10:11:48 10.5 0.24 37 5511_Cloanthus 05:48:33.7 +10:10:48 15.8 37 Positions are for equinox of date
Star training set for 5511_Cloanthus, (2026/11/24 02:27UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 3.41 40 Bellatrix 05:25:07.8 +06:20:58 1.6 6.64 34 PPM 149523 05:50:02.7 +09:52:15 6.4 0.79 38 PPM 149440 05:46:49.8 +09:39:46 8.4 0.51 37 PPM 121373 05:46:06.2 +10:06:07 8.6 0.25 37 PPM 121409 05:48:02.0 +10:11:22 10.5 0.24 37 5511_Cloanthus 05:47:04.5 +10:10:19 15.8 37 Positions are for J2000