Occultation event with (22149) 00WD49, event index number 3585
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/04/06 04:17:50 UTC
J2000 position of star is 11:27:32.6 -24:27:43
Equinox of date position of star is 11:28:51.2 -24:36:24
Star is 60 degrees from the moon. Moon is 85% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 7.6 per integration for unocculted signal
Expected flux drop is 50% with SNR of 3.8 for the occulted depth (per occulted point)
Apparent velocity is 15.6 km/sec on the sky relative to the star, or, 19.1 arcsec/hr.
Position angle of asteroid motion is 119.5 degrees
The recommended exposure time corresponds to 11.7 km per image.
The 1-sigma error in the time of the event is 2.1 seconds.
The 1-sigma cross-track error in the shadow position is 16.5 km.
The sky-plane scale is 2944.5 km/arcsec.
Diameter estimates:
52.0 km assuming a 5% albedo, maximum of 3.3 sec for a central chord
21.2 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 48.2 km used for deployment plan.
Star training set for 22149_00WD49, (2026/04/06 04:18UT) Object RA Dec mag sep mel Spica 13:26:34.8 -11:17:51 1.0 30.90 39 4Gam Crv 12:17:09.6 -17:41:15 2.6 13.21 52 PPM 259120 11:33:41.8 -26:53:31 5.9 2.53 59 PPM 259015 11:28:39.6 -24:18:52 7.5 0.30 60 PPM 259017 11:28:41.3 -24:46:27 10.0 0.17 60 22149_00WD49 11:28:51.2 -24:36:24 15.1 60 Positions are for equinox of date
Star training set for 22149_00WD49, (2026/04/06 04:18UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 30.90 39 4Gam Crv 12:15:48.1 -17:32:30 2.6 13.21 52 PPM 259120 11:32:23.1 -26:44:48 5.9 2.53 59 PPM 259015 11:27:21.0 -24:10:11 7.5 0.30 60 PPM 259017 11:27:22.7 -24:37:45 10.0 0.17 60 22149_00WD49 11:27:32.6 -24:27:43 15.1 60 Positions are for J2000