Occultation event with (22149) 00WD49, event index number 3741
Regions able to see the event: Australia
Geocentric closest approach at 2026/05/12 08:59:54 UTC
J2000 position of star is 11:17:15.8 -21:53:17
Equinox of date position of star is 11:18:34.3 -22:01:57
Star is 156 degrees from the moon. Moon is 25% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=15.4
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
SNR of 3.7 per integration for unocculted signal
Expected flux drop is 29% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 9.0 km/sec on the sky relative to the star, or, 10.3 arcsec/hr.
Position angle of asteroid motion is 170.4 degrees
The recommended exposure time corresponds to 11.7 km per image.
The 1-sigma error in the time of the event is 3.6 seconds.
The 1-sigma cross-track error in the shadow position is 15.0 km.
The sky-plane scale is 3140.2 km/arcsec.
Diameter estimates:
52.0 km assuming a 5% albedo, maximum of 5.8 sec for a central chord
21.2 km assuming a 30% albedo, maximum of 2.4 sec for a central chord
Cross-track diameter of 48.2 km used for deployment plan.
Star training set for 22149_00WD49, (2026/05/12 09:00UT) Object RA Dec mag sep mel Spica 13:26:35.1 -11:17:53 1.0 32.40 148 4Gam Crv 12:17:09.9 -17:41:17 2.6 14.44 157 PPM 258681 11:13:53.0 -21:53:35 6.2 1.10 156 PPM 258809 11:19:05.5 -22:17:25 7.1 0.28 156 PPM 258788 11:18:05.0 -22:01:29 8.9 0.11 156 22149_00WD49 11:18:34.3 -22:01:57 15.4 156 Positions are for equinox of date
Star training set for 22149_00WD49, (2026/05/12 09:00UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 32.40 148 4Gam Crv 12:15:48.1 -17:32:30 2.6 14.44 157 PPM 258681 11:12:34.8 -21:44:58 6.2 1.10 156 PPM 258809 11:17:47.1 -22:08:46 7.1 0.28 156 PPM 258788 11:16:46.6 -21:52:50 8.9 0.11 156 22149_00WD49 11:17:15.8 -21:53:17 15.4 156 Positions are for J2000