Occultation event with (22149) 00WD49, event index number 3717
Regions able to see the event: NZ
Geocentric closest approach at 2026/05/05 07:10:25 UTC
J2000 position of star is 11:17:57.5 -22:23:01
Equinox of date position of star is 11:19:15.9 -22:31:40
Star is 83 degrees from the moon. Moon is 89% illuminated.
Stellar brightness G=13.1, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 89% with SNR of 8.7 for the occulted depth (per occulted point)
Apparent velocity is 10.2 km/sec on the sky relative to the star, or, 11.9 arcsec/hr.
Position angle of asteroid motion is 154.8 degrees
The recommended exposure time corresponds to 1.2 km per image.
The 1-sigma error in the time of the event is 3.5 seconds.
The 1-sigma cross-track error in the shadow position is 5.9 km.
The sky-plane scale is 3086.3 km/arcsec.
Diameter estimates:
52.0 km assuming a 5% albedo, maximum of 5.1 sec for a central chord
21.2 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 48.2 km used for deployment plan.
Star training set for 22149_00WD49, (2026/05/05 07:10UT) Object RA Dec mag sep mel Spica 13:26:35.1 -11:17:53 1.0 32.37 60 4Gam Crv 12:17:09.9 -17:41:17 2.6 14.42 73 PPM 258681 11:13:53.0 -21:53:35 6.2 1.40 84 PPM 258814 11:19:13.5 -22:34:33 8.3 0.05 83 22149_00WD49 11:19:15.9 -22:31:40 15.4 83 Positions are for equinox of date
Star training set for 22149_00WD49, (2026/05/05 07:10UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 32.37 60 4Gam Crv 12:15:48.1 -17:32:30 2.6 14.42 73 PPM 258681 11:12:34.8 -21:44:58 6.2 1.40 84 PPM 258814 11:17:55.1 -22:25:53 8.3 0.05 83 22149_00WD49 11:17:57.5 -22:23:01 15.4 83 Positions are for J2000