Occultation event with (15539) 00CN3, event index number 815
Regions able to see the event: Europe
Geocentric closest approach at 2025/03/15 17:54:11 UTC
J2000 position of star is 06:47:48.3 +24:50:00
Equinox of date position of star is 06:49:21.1 +24:48:14
Star is 91 degrees from the moon. Moon is 98% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=15.8
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
Expected flux drop is 34% with SNR of 9.8 per integration
Apparent velocity is 6.3 km/sec on the sky relative to the star, or, 6.7 arcsec/hr.
The recommended exposure time corresponds to 6.6 km per image.
The 1-sigma error in the time of the event is 4.7 seconds.
The 1-sigma cross-track error in the shadow position is 40.8 km.
The sky-plane scale is 3392.5 km/arcsec.
Diameter estimates:
48.1 km assuming a 5% albedo, aximum of 7.6 sec for a central chord
19.6 km assuming a 30% albedo, maximum of 3.1 sec for a central chord
Cross-track diameter of 48.1 km used for deployment plan.
Star training set for 15539_00CN3, (2025/03/15 17:54UT) Object RA Dec mag sep mel Pollux 07:46:51.3 +27:57:48 1.1 13.25 78 Alhena 06:39:10.1 +16:22:32 1.9 8.76 92 37 Gem 06:56:51.5 +25:20:31 6.3 1.78 89 PPM 096625 06:52:33.7 +25:43:39 7.5 1.17 90 PPM 096537 06:48:47.9 +24:48:26 9.8 0.13 91 15539_00CN3 06:49:21.1 +24:48:14 15.8 90 Positions are for equinox of date
Star training set for 15539_00CN3, (2025/03/15 17:54UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 13.25 78 Alhena 06:37:42.8 +16:23:56 1.9 8.76 92 37 Gem 06:55:18.5 +25:22:33 6.3 1.78 89 PPM 096625 06:51:00.4 +25:45:32 7.5 1.17 90 PPM 096537 06:47:15.2 +24:50:11 9.8 0.13 91 15539_00CN3 06:47:48.3 +24:50:00 15.8 91 Positions are for J2000