Occultation event with (22149) 00WD49, event index number 710
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/02/25 08:33:48 UTC
J2000 position of star is 09:29:52.5 -02:01:56
Equinox of date position of star is 09:31:09.1 -02:08:37
Star is 149 degrees from the moon. Moon is 9% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=15.0
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
Expected flux drop is 69% with SNR of 4.0 per integration
Apparent velocity is 16.8 km/sec on the sky relative to the star, or, 20.9 arcsec/hr.
The recommended exposure time corresponds to 12.6 km per image.
The 1-sigma error in the time of the event is 2.5 seconds.
The 1-sigma cross-track error in the shadow position is 31.8 km.
The sky-plane scale is 2896.0 km/arcsec.
Diameter estimates:
51.0 km assuming a 5% albedo, aximum of 3.0 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 51.0 km used for deployment plan.
Star training set for 22149_00WD49, (2025/02/25 08:34UT) Object RA Dec mag sep mel Regulus 10:09:42.5 +11:50:36 1.3 16.95 152 Alphard 09:28:49.4 -08:46:08 2.0 6.65 143 PPM 177884 09:30:40.9 -02:18:59 6.4 0.21 149 22149_00WD49 09:31:09.1 -02:08:37 15.0 149 Positions are for equinox of date
Star training set for 22149_00WD49, (2025/02/25 08:34UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 16.95 152 Alphard 09:27:35.2 -08:39:30 2.0 6.65 143 PPM 177884 09:29:24.3 -02:12:19 6.4 0.21 149 22149_00WD49 09:29:52.5 -02:01:56 15.0 149 Positions are for J2000