Occultation event with (15539) 00CN3, event index number 773
Regions able to see the event: Australia
Geocentric closest approach at 2025/03/07 11:20:32 UTC
J2000 position of star is 06:47:23.5 +24:30:32
Equinox of date position of star is 06:48:55.9 +24:28:47
Star is 14 degrees from the moon. Moon is 59% illuminated.
Stellar brightness G=16.7, apparent brightess of occulting body is G=15.8
Use an exposure time of 2.00 seconds with the standard RECON-QHY system.
Expected flux drop is 70% with SNR of 3.8 per integration
Apparent velocity is 5.7 km/sec on the sky relative to the star, or, 6.3 arcsec/hr.
The recommended exposure time corresponds to 11.5 km per image.
The 1-sigma error in the time of the event is 3.6 seconds.
The 1-sigma cross-track error in the shadow position is 44.4 km.
The sky-plane scale is 3302.2 km/arcsec.
Diameter estimates:
48.1 km assuming a 5% albedo, aximum of 8.4 sec for a central chord
19.6 km assuming a 30% albedo, maximum of 3.4 sec for a central chord
Cross-track diameter of 48.1 km used for deployment plan.
Star training set for 15539_00CN3, (2025/03/07 11:21UT) Object RA Dec mag sep mel Pollux 07:46:51.2 +27:57:48 1.1 13.44 26 Alhena 06:39:10.0 +16:22:32 1.9 8.42 17 37 Gem 06:56:51.4 +25:20:31 6.3 1.99 16 PPM 096615 06:52:10.5 +23:39:44 8.4 1.10 15 PPM 096567 06:50:01.6 +24:19:50 9.0 0.29 14 15539_00CN3 06:48:55.9 +24:28:47 15.8 15 Positions are for equinox of date
Star training set for 15539_00CN3, (2025/03/07 11:21UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 13.44 26 Alhena 06:37:42.8 +16:23:56 1.9 8.42 17 37 Gem 06:55:18.5 +25:22:33 6.3 1.99 16 PPM 096615 06:50:38.7 +23:41:36 8.4 1.10 15 PPM 096567 06:48:29.3 +24:21:38 9.0 0.29 14 15539_00CN3 06:47:23.5 +24:30:32 15.8 14 Positions are for J2000