Occultation event with (5511) Cloanthus, event index number 4807
Regions able to see the event: Europe
Geocentric closest approach at 2026/11/21 23:15:24 UTC
J2000 position of star is 05:47:58.8 +10:13:01
Equinox of date position of star is 05:49:28.0 +10:13:28
Star is 65 degrees from the moon. Moon is 90% illuminated.
Stellar brightness G=14.7, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 9.5 per integration for unocculted signal
Expected flux drop is 74% with SNR of 7.1 for the occulted depth (per occulted point)
Apparent velocity is 15.4 km/sec on the sky relative to the star, or, 15.7 arcsec/hr.
Position angle of asteroid motion is 78.0 degrees
The recommended exposure time corresponds to 9.3 km per image.
The 1-sigma error in the time of the event is 0.5 seconds.
The 1-sigma cross-track error in the shadow position is 28.4 km.
The sky-plane scale is 3538.5 km/arcsec.
Diameter estimates:
50.3 km assuming a 5% albedo, maximum of 3.3 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, (2026/11/21 23:15UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.7 +07:24:35 0.4 3.32 68 Bellatrix 05:26:34.5 +06:22:18 1.6 6.85 60 PPM 149523 05:51:31.6 +09:52:37 6.4 0.61 66 PPM 149505 05:50:34.6 +09:53:59 9.7 0.42 66 PPM 121409 05:49:31.2 +10:11:48 10.5 0.03 65 5511_Cloanthus 05:49:28.0 +10:13:28 15.9 66 Positions are for equinox of date
Star training set for 5511_Cloanthus, (2026/11/21 23:15UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 3.32 68 Bellatrix 05:25:07.8 +06:20:58 1.6 6.85 60 PPM 149523 05:50:02.7 +09:52:15 6.4 0.61 66 PPM 149505 05:49:05.6 +09:53:35 9.7 0.42 66 PPM 121409 05:48:02.0 +10:11:22 10.5 0.03 65 5511_Cloanthus 05:47:58.8 +10:13:01 15.9 65 Positions are for J2000