Occultation event with (7641) Cteatus, event index number 643
Regions able to see the event: Australia
Geocentric closest approach at 2025/02/16 13:03:33 UTC
J2000 position of star is 07:53:01.5 -19:40:01
Equinox of date position of star is 07:54:08.2 -19:44:00
Star is 72 degrees from the moon. Moon is 86% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=14.5
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
Expected flux drop is 79% with SNR of 4.7 per integration
Apparent velocity is 15.2 km/sec on the sky relative to the star, or, 18.0 arcsec/hr.
The recommended exposure time corresponds to 18.2 km per image.
The 1-sigma error in the time of the event is 2.5 seconds.
The 1-sigma cross-track error in the shadow position is 29.6 km.
The sky-plane scale is 3043.5 km/arcsec.
Diameter estimates:
75.9 km assuming a 5% albedo, aximum of 5.0 sec for a central chord
31.0 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 75.9 km used for deployment plan.
Star training set for 7641_Cteatus, (2025/02/16 13:04UT) Object RA Dec mag sep mel Adhara 06:59:36.8 -29:00:28 1.5 15.48 84 15Rho Pup 08:08:36.9 -24:22:41 2.8 5.73 68 PPM 219262 07:51:12.4 -19:35:18 6.1 0.71 72 PPM 219328 07:53:48.0 -19:43:15 8.7 0.08 72 7641_Cteatus 07:54:08.2 -19:44:00 14.5 71 Positions are for equinox of date
Star training set for 7641_Cteatus, (2025/02/16 13:04UT) Object RA Dec mag sep mel Adhara 06:58:37.6 -28:58:19 1.5 15.48 84 15Rho Pup 08:07:32.5 -24:18:14 2.8 5.73 68 PPM 219262 07:50:05.6 -19:31:24 6.1 0.71 72 PPM 219328 07:52:41.3 -19:39:16 8.7 0.08 72 7641_Cteatus 07:53:01.5 -19:40:01 14.5 72 Positions are for J2000