Occultation event with (5511) Cloanthus, event index number 4213
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/10 06:17:55 UTC
J2000 position of star is 05:49:37.2 +12:28:34
Equinox of date position of star is 05:51:07.2 +12:28:56
Star is 69 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=16.5
Use an exposure time of 1.15 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 46% with SNR of 1.4 for the occulted depth (per occulted point)
Apparent velocity is 17.2 km/sec on the sky relative to the star, or, 14.7 arcsec/hr.
Position angle of asteroid motion is 107.1 degrees
The recommended exposure time corresponds to 19.8 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 4209.2 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, (2026/09/10 06:18UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.1 +07:24:35 0.4 5.25 68 Bellatrix 05:26:33.8 +06:22:18 1.6 8.60 76 134 Tau 05:51:02.9 +12:39:27 4.8 0.18 69 PPM 121427 05:50:32.4 +12:30:16 8.2 0.14 69 5511_Cloanthus 05:51:07.2 +12:28:56 16.5 69 Positions are for equinox of date
Star training set for 5511_Cloanthus, (2026/09/10 06:18UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 5.25 68 Bellatrix 05:25:07.8 +06:20:58 1.6 8.60 76 134 Tau 05:49:32.8 +12:39:04 4.8 0.18 69 PPM 121427 05:49:02.4 +12:29:52 8.2 0.14 69 5511_Cloanthus 05:49:37.2 +12:28:34 16.5 69 Positions are for J2000