Occultation event with (15539) 00CN3, event index number 846
Regions able to see the event: Japan
Geocentric closest approach at 2025/03/23 09:48:26 UTC
J2000 position of star is 06:49:04.9 +25:05:58
Equinox of date position of star is 06:50:37.8 +25:04:09
Star is 176 degrees from the moon. Moon is 41% illuminated.
Stellar brightness G=14.5, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
Expected flux drop is 21% with SNR of 9.9 per integration
Apparent velocity is 8.7 km/sec on the sky relative to the star, or, 9.0 arcsec/hr.
The recommended exposure time corresponds to 4.3 km per image.
The 1-sigma error in the time of the event is 4.6 seconds.
The 1-sigma cross-track error in the shadow position is 32.8 km.
The sky-plane scale is 3479.3 km/arcsec.
Diameter estimates:
48.1 km assuming a 5% albedo, aximum of 5.6 sec for a central chord
19.6 km assuming a 30% albedo, maximum of 2.3 sec for a central chord
Cross-track diameter of 48.1 km used for deployment plan.
Star training set for 15539_00CN3, (2025/03/23 09:48UT) Object RA Dec mag sep mel Pollux 07:46:51.4 +27:57:47 1.1 12.90 171 Alhena 06:39:10.1 +16:22:32 1.9 9.10 167 37 Gem 06:56:51.6 +25:20:31 6.3 1.44 177 PPM 096625 06:52:33.8 +25:43:39 7.5 0.79 177 PPM 096597 06:51:18.7 +24:42:18 10.0 0.40 176 PPM 096568 06:50:03.4 +25:11:34 10.2 0.18 176 15539_00CN3 06:50:37.8 +25:04:09 15.9 176 Positions are for equinox of date
Star training set for 15539_00CN3, (2025/03/23 09:48UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 12.90 171 Alhena 06:37:42.8 +16:23:56 1.9 9.10 167 37 Gem 06:55:18.5 +25:22:33 6.3 1.44 177 PPM 096625 06:51:00.4 +25:45:32 7.5 0.79 177 PPM 096597 06:49:46.0 +24:44:09 10.0 0.40 176 PPM 096568 06:48:30.3 +25:13:22 10.2 0.18 176 15539_00CN3 06:49:04.9 +25:05:58 15.9 176 Positions are for J2000