Occultation event with (7641) Cteatus, event index number 708
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/02/25 00:45:29 UTC
J2000 position of star is 07:49:35.9 -19:07:56
Equinox of date position of star is 07:50:42.9 -19:11:49
Star is 136 degrees from the moon. Moon is 12% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=14.5
Use an exposure time of 1.35 seconds with the standard RECON-QHY system.
Expected flux drop is 67% with SNR of 8.7 per integration
Apparent velocity is 14.0 km/sec on the sky relative to the star, or, 16.3 arcsec/hr.
The recommended exposure time corresponds to 18.9 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 30.4 km.
The sky-plane scale is 3078.4 km/arcsec.
Diameter estimates:
75.9 km assuming a 5% albedo, aximum of 5.4 sec for a central chord
31.0 km assuming a 30% albedo, maximum of 2.2 sec for a central chord
Cross-track diameter of 75.9 km used for deployment plan.
Star training set for 7641_Cteatus, (2025/02/25 00:45UT) Object RA Dec mag sep mel Adhara 06:59:36.9 -29:00:28 1.5 15.22 124 15Rho Pup 08:08:36.9 -24:22:41 2.8 6.64 130 PPM 219262 07:51:12.4 -19:35:18 6.1 0.41 135 PPM 219229 07:49:50.8 -19:14:21 7.4 0.21 136 7641_Cteatus 07:50:42.9 -19:11:49 14.5 136 Positions are for equinox of date
Star training set for 7641_Cteatus, (2025/02/25 00:45UT) Object RA Dec mag sep mel Adhara 06:58:37.6 -28:58:19 1.5 15.22 124 15Rho Pup 08:07:32.5 -24:18:14 2.8 6.64 130 PPM 219262 07:50:05.6 -19:31:24 6.1 0.41 135 PPM 219229 07:48:43.9 -19:10:30 7.4 0.21 136 7641_Cteatus 07:49:35.9 -19:07:56 14.5 136 Positions are for J2000