Occultation event with (15539) 00CN3, event index number 1186
Regions able to see the event: SMexico
Geocentric closest approach at 2025/04/08 01:00:22 UTC
J2000 position of star is 06:54:10.9 +25:32:35
Equinox of date position of star is 06:55:44.3 +25:30:35
Star is 41 degrees from the moon. Moon is 79% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 44% with SNR of 1.4 for the occulted depth (per occulted point)
Apparent velocity is 15.1 km/sec on the sky relative to the star, or, 14.9 arcsec/hr.
The recommended exposure time corresponds to 12.1 km per image.
The 1-sigma error in the time of the event is 3.0 seconds.
The 1-sigma cross-track error in the shadow position is 21.6 km.
The sky-plane scale is 3660.0 km/arcsec.
Diameter estimates:
47.9 km assuming a 5% albedo, aximum of 3.2 sec for a central chord
19.5 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 47.9 km used for deployment plan.
Star training set for 15539_00CN3, (2025/04/08 01:00UT) Object RA Dec mag sep mel Pollux 07:46:51.5 +27:57:47 1.1 11.67 30 Alhena 06:39:10.3 +16:22:32 1.9 9.92 45 37 Gem 06:56:51.8 +25:20:31 6.3 0.30 41 PPM 096713 06:55:49.5 +25:27:46 11.0 0.05 41 15539_00CN3 06:55:44.3 +25:30:35 16.0 41 Positions are for equinox of date
Star training set for 15539_00CN3, (2025/04/08 01:00UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 11.67 30 Alhena 06:37:42.8 +16:23:56 1.9 9.92 45 37 Gem 06:55:18.5 +25:22:33 6.3 0.30 41 PPM 096713 06:54:16.2 +25:29:47 11.0 0.05 41 15539_00CN3 06:54:10.9 +25:32:35 16.0 41 Positions are for J2000