Occultation event with (22149) 00WD49, event index number 3296
Regions able to see the event: Australia,NZ
Geocentric closest approach at 2026/02/23 10:16:25 UTC
J2000 position of star is 11:50:14.2 -25:32:03
Equinox of date position of star is 11:51:33.9 -25:40:47
Star is 135 degrees from the moon. Moon is 38% illuminated.
Stellar brightness G=13.6, apparent brightess of occulting body is G=15.3
Use an exposure time of 0.19 seconds with the standard RECON-QHY system.
SNR of 9.9 per integration for unocculted signal
Expected flux drop is 82% with SNR of 8.2 for the occulted depth (per occulted point)
Apparent velocity is 13.9 km/sec on the sky relative to the star, or, 16.5 arcsec/hr.
Position angle of asteroid motion is 79.8 degrees
The recommended exposure time corresponds to 2.6 km per image.
The 1-sigma error in the time of the event is 0.9 seconds.
The 1-sigma cross-track error in the shadow position is 33.9 km.
The sky-plane scale is 3022.0 km/arcsec.
Diameter estimates:
52.0 km assuming a 5% albedo, maximum of 3.8 sec for a central chord
21.2 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 48.2 km used for deployment plan.
Star training set for 22149_00WD49, (2026/02/23 10:16UT) Object RA Dec mag sep mel Spica 13:26:34.5 -11:17:49 1.0 26.65 153 4Gam Crv 12:17:09.3 -17:41:13 2.6 9.96 140 PPM 259621 11:56:02.7 -25:51:32 5.3 1.02 136 PPM 259481 11:49:50.1 -25:13:52 8.3 0.59 135 PPM 259479 11:49:44.1 -25:33:52 9.9 0.43 135 22149_00WD49 11:51:33.9 -25:40:47 15.3 136 Positions are for equinox of date
Star training set for 22149_00WD49, (2026/02/23 10:16UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 26.65 153 4Gam Crv 12:15:48.1 -17:32:30 2.6 9.96 140 PPM 259621 11:54:42.6 -25:42:48 5.3 1.02 136 PPM 259481 11:48:30.5 -25:05:09 8.3 0.59 135 PPM 259479 11:48:24.5 -25:25:08 9.9 0.43 135 22149_00WD49 11:50:14.2 -25:32:03 15.3 135 Positions are for J2000