Occultation event with (22149) 00WD49, event index number 3504
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/03/26 07:21:46 UTC
J2000 position of star is 11:33:14.3 -25:03:50
Equinox of date position of star is 11:34:33.1 -25:12:32
Star is 85 degrees from the moon. Moon is 56% illuminated.
Stellar brightness G=12.6, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 13.9 per integration for unocculted signal
Expected flux drop is 90% with SNR of 12.5 for the occulted depth (per occulted point)
Apparent velocity is 16.4 km/sec on the sky relative to the star, or, 20.1 arcsec/hr.
Position angle of asteroid motion is 110.5 degrees
The recommended exposure time corresponds to 2.0 km per image.
The 1-sigma error in the time of the event is 1.8 seconds.
The 1-sigma cross-track error in the shadow position is 21.6 km.
The sky-plane scale is 2931.4 km/arcsec.
Diameter estimates:
52.0 km assuming a 5% albedo, maximum of 3.2 sec for a central chord
21.2 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 48.2 km used for deployment plan.
Star training set for 22149_00WD49, (2026/03/26 07:22UT) Object RA Dec mag sep mel Spica 13:26:34.7 -11:17:51 1.0 29.92 102 4Gam Crv 12:17:09.5 -17:41:15 2.6 12.43 90 PPM 259265 11:40:19.7 -24:52:05 6.4 1.35 86 PPM 259146 11:34:52.4 -24:52:17 8.5 0.35 85 PPM 259136 11:34:23.8 -25:04:12 9.9 0.14 85 22149_00WD49 11:34:33.1 -25:12:32 15.1 85 Positions are for equinox of date
Star training set for 22149_00WD49, (2026/03/26 07:22UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 29.92 102 4Gam Crv 12:15:48.1 -17:32:30 2.6 12.43 90 PPM 259265 11:39:00.5 -24:43:22 6.4 1.35 86 PPM 259146 11:33:33.6 -24:43:35 8.5 0.35 85 PPM 259136 11:33:05.0 -24:55:30 9.9 0.14 85 22149_00WD49 11:33:14.3 -25:03:50 15.1 85 Positions are for J2000