Occultation event with (7641) Cteatus, event index number 3249
Regions able to see the event: SAmericaS
Geocentric closest approach at 2026/02/15 03:11:57 UTC
J2000 position of star is 10:36:30.8 -34:47:22
Equinox of date position of star is 10:37:42.5 -34:55:32
Star is 111 degrees from the moon. Moon is 6% illuminated.
Stellar brightness G=15.6, apparent brightess of occulting body is G=14.6
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
SNR of 6.1 per integration for unocculted signal
Expected flux drop is 27% with SNR of 1.7 for the occulted depth (per occulted point)
Apparent velocity is 14.4 km/sec on the sky relative to the star, or, 16.5 arcsec/hr.
Position angle of asteroid motion is 91.4 degrees
The recommended exposure time corresponds to 17.3 km per image.
The 1-sigma error in the time of the event is 0.9 seconds.
The 1-sigma cross-track error in the shadow position is 44.6 km.
The sky-plane scale is 3142.4 km/arcsec.
Diameter estimates:
76.6 km assuming a 5% albedo, maximum of 5.3 sec for a central chord
31.3 km assuming a 30% albedo, maximum of 2.2 sec for a central chord
Cross-track diameter of 71.8 km used for deployment plan.
Star training set for 7641_Cteatus, (2026/02/15 03:12UT) Object RA Dec mag sep mel Bet Cru 12:49:16.0 -59:49:52 1.3 32.76 79 Mu Vel 10:47:54.1 -49:33:31 2.8 14.75 98 PPM 287986 10:42:03.4 -35:52:44 6.4 1.30 110 PPM 287859 10:36:04.5 -35:13:14 8.2 0.45 111 PPM 287902 10:38:12.9 -34:49:57 8.7 0.14 111 7641_Cteatus 10:37:42.5 -34:55:32 14.6 111 Positions are for equinox of date
Star training set for 7641_Cteatus, (2026/02/15 03:12UT) Object RA Dec mag sep mel Bet Cru 12:47:43.1 -59:41:20 1.3 32.76 79 Mu Vel 10:46:46.5 -49:25:13 2.8 14.75 98 PPM 287986 10:40:51.5 -35:44:30 6.4 1.30 110 PPM 287859 10:34:53.1 -35:05:06 8.2 0.45 111 PPM 287902 10:37:01.1 -34:41:47 8.7 0.14 111 7641_Cteatus 10:36:30.8 -34:47:22 14.6 111 Positions are for J2000