Occultation event with (22149) 00WD49, event index number 3272
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/02/19 22:50:57 UTC
J2000 position of star is 11:51:51.1 -25:27:11
Equinox of date position of star is 11:53:10.9 -25:35:55
Star is 157 degrees from the moon. Moon is 7% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.3
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 3.3 per integration for unocculted signal
Expected flux drop is 29% with SNR of 1.0 for the occulted depth (per occulted point)
Apparent velocity is 13.3 km/sec on the sky relative to the star, or, 15.7 arcsec/hr.
Position angle of asteroid motion is 74.9 degrees
The recommended exposure time corresponds to 12.0 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 34.0 km.
The sky-plane scale is 3043.1 km/arcsec.
Diameter estimates:
52.0 km assuming a 5% albedo, maximum of 3.9 sec for a central chord
21.2 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 48.2 km used for deployment plan.
Star training set for 22149_00WD49, (2026/02/19 22:51UT) Object RA Dec mag sep mel Spica 13:26:34.4 -11:17:49 1.0 26.29 158 4Gam Crv 12:17:09.3 -17:41:13 2.6 9.67 165 PPM 259621 11:56:02.7 -25:51:31 5.3 0.70 157 PPM 259481 11:49:50.1 -25:13:52 8.3 0.84 157 PPM 259569 11:53:33.8 -25:42:18 9.5 0.14 157 22149_00WD49 11:53:10.9 -25:35:55 15.3 157 Positions are for equinox of date
Star training set for 22149_00WD49, (2026/02/19 22:51UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 26.29 158 4Gam Crv 12:15:48.1 -17:32:30 2.6 9.67 165 PPM 259621 11:54:42.6 -25:42:48 5.3 0.70 157 PPM 259481 11:48:30.5 -25:05:09 8.3 0.84 157 PPM 259569 11:52:13.9 -25:33:35 9.5 0.14 157 22149_00WD49 11:51:51.1 -25:27:11 15.3 157 Positions are for J2000