Occultation event with (7641) Cteatus, event index number 501
Regions able to see the event: SAmericaN,SAmericaS,SAfrica
Geocentric closest approach at 2025/01/25 03:19:07 UTC
J2000 position of star is 08:05:03.3 -20:20:34
Equinox of date position of star is 08:06:09.8 -20:24:56
Star is 111 degrees from the moon. Moon is 21% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=14.4
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
Expected flux drop is 76% with SNR of 5.3 per integration
Apparent velocity is 17.4 km/sec on the sky relative to the star, or, 20.8 arcsec/hr.
The recommended exposure time corresponds to 18.2 km per image.
The 1-sigma error in the time of the event is 2.4 seconds.
The 1-sigma cross-track error in the shadow position is 22.8 km.
The sky-plane scale is 3008.7 km/arcsec.
Diameter estimates:
75.9 km assuming a 5% albedo, aximum of 4.4 sec for a central chord
31.0 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 75.9 km used for deployment plan.
Star training set for 7641_Cteatus, (2025/01/25 03:19UT) Object RA Dec mag sep mel Adhara 06:59:36.7 -29:00:28 1.5 17.36 115 15Rho Pup 08:08:36.7 -24:22:41 2.8 4.00 108 PPM 253878 08:08:24.4 -20:37:42 5.5 0.57 110 PPM 253850 08:07:37.5 -20:24:28 8.4 0.34 111 PPM 253779 08:05:36.0 -20:27:36 8.8 0.14 111 7641_Cteatus 08:06:09.8 -20:24:56 14.4 111 Positions are for equinox of date
Star training set for 7641_Cteatus, (2025/01/25 03:19UT) Object RA Dec mag sep mel Adhara 06:58:37.6 -28:58:19 1.5 17.36 115 15Rho Pup 08:07:32.5 -24:18:14 2.8 4.00 108 PPM 253878 08:07:18.0 -20:33:16 5.5 0.57 110 PPM 253850 08:06:30.9 -20:20:04 8.4 0.34 111 PPM 253779 08:04:29.6 -20:23:15 8.8 0.14 111 7641_Cteatus 08:05:03.3 -20:20:34 14.4 111 Positions are for J2000