Occultation event with (7641) Cteatus, event index number 718
Regions able to see the event: Australia
Geocentric closest approach at 2025/02/26 14:08:32 UTC
J2000 position of star is 07:49:03.6 -19:01:20
Equinox of date position of star is 07:50:10.7 -19:05:12
Star is 135 degrees from the moon. Moon is 3% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=14.5
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
Expected flux drop is 45% with SNR of 9.9 per integration
Apparent velocity is 13.7 km/sec on the sky relative to the star, or, 16.0 arcsec/hr.
The recommended exposure time corresponds to 6.2 km per image.
The 1-sigma error in the time of the event is 2.3 seconds.
The 1-sigma cross-track error in the shadow position is 33.3 km.
The sky-plane scale is 3086.0 km/arcsec.
Diameter estimates:
75.9 km assuming a 5% albedo, aximum of 5.5 sec for a central chord
31.0 km assuming a 30% albedo, maximum of 2.3 sec for a central chord
Cross-track diameter of 75.9 km used for deployment plan.
Star training set for 7641_Cteatus, (2025/02/26 14:09UT) Object RA Dec mag sep mel Adhara 06:59:36.9 -29:00:28 1.5 15.20 120 15Rho Pup 08:08:37.0 -24:22:42 2.8 6.81 133 PPM 219262 07:51:12.4 -19:35:18 6.1 0.56 135 PPM 219229 07:49:50.8 -19:14:21 7.4 0.17 135 7641_Cteatus 07:50:10.7 -19:05:12 14.5 135 Positions are for equinox of date
Star training set for 7641_Cteatus, (2025/02/26 14:09UT) Object RA Dec mag sep mel Adhara 06:58:37.6 -28:58:19 1.5 15.20 120 15Rho Pup 08:07:32.5 -24:18:14 2.8 6.81 133 PPM 219262 07:50:05.6 -19:31:24 6.1 0.56 135 PPM 219229 07:48:43.9 -19:10:30 7.4 0.17 135 7641_Cteatus 07:49:03.6 -19:01:20 14.5 135 Positions are for J2000