Occultation event with (22149) 00WD49, event index number 793
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/03/11 03:17:08 UTC
J2000 position of star is 09:22:59.0 -01:38:51
Equinox of date position of star is 09:24:15.8 -01:45:22
Star is 21 degrees from the moon. Moon is 91% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
Expected flux drop is 69% with SNR of 3.9 per integration
Apparent velocity is 14.0 km/sec on the sky relative to the star, or, 17.2 arcsec/hr.
The recommended exposure time corresponds to 12.6 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 32.9 km.
The sky-plane scale is 2943.7 km/arcsec.
Diameter estimates:
51.0 km assuming a 5% albedo, aximum of 3.6 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 51.0 km used for deployment plan.
Star training set for 22149_00WD49, (2025/03/11 03:17UT) Object RA Dec mag sep mel Regulus 10:09:42.7 +11:50:35 1.3 17.68 15 Alphard 09:28:49.5 -08:46:08 2.0 7.10 29 PPM 177884 09:30:41.0 -02:19:00 6.4 1.70 22 PPM 177840 09:23:49.1 -01:11:04 8.4 0.58 21 PPM 177845 09:25:25.8 -01:30:10 9.8 0.39 21 PPM 177836 09:23:20.3 -01:51:56 10.3 0.26 22 22149_00WD49 09:24:15.8 -01:45:22 15.2 22 Positions are for equinox of date
Star training set for 22149_00WD49, (2025/03/11 03:17UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 17.68 15 Alphard 09:27:35.2 -08:39:30 2.0 7.10 29 PPM 177884 09:29:24.3 -02:12:19 6.4 1.70 22 PPM 177840 09:22:32.1 -01:04:33 8.4 0.58 21 PPM 177845 09:24:08.9 -01:23:37 9.8 0.39 21 PPM 177836 09:22:03.5 -01:45:25 10.3 0.26 22 22149_00WD49 09:22:59.0 -01:38:51 15.2 21 Positions are for J2000