Occultation event with (22149) 00WD49, event index number 1613
Regions able to see the event: Australia
Geocentric closest approach at 2025/11/29 20:13:01 UTC
J2000 position of star is 11:46:52.2 -17:57:14
Equinox of date position of star is 11:48:11.3 -18:05:52
Star is 162 degrees from the moon. Moon is 67% illuminated.
Stellar brightness G=13.0, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 10.9 per integration for unocculted signal
Expected flux drop is 93% with SNR of 10.2 for the occulted depth (per occulted point)
Apparent velocity is 28.5 km/sec on the sky relative to the star, or, 26.7 arcsec/hr.
Position angle of asteroid motion is 134.9 degrees
The recommended exposure time corresponds to 3.4 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 8.1 km.
The sky-plane scale is 3836.0 km/arcsec.
Diameter estimates:
52.0 km assuming a 5% albedo, aximum of 1.8 sec for a central chord
21.2 km assuming a 30% albedo, maximum of 0.7 sec for a central chord
Cross-track diameter of 48.2 km used for deployment plan.
Star training set for 22149_00WD49, (2025/11/29 20:13UT) Object RA Dec mag sep mel Spica 13:26:33.7 -11:17:45 1.0 24.71 153 4Gam Crv 12:17:08.6 -17:41:08 2.6 6.90 161 27Zet Crt 11:46:04.8 -18:29:42 4.7 0.64 162 PPM 224968 11:50:57.3 -17:45:36 8.3 0.74 162 PPM 224896 11:48:03.7 -18:00:25 9.6 0.10 162 22149_00WD49 11:48:11.3 -18:05:52 15.9 162 Positions are for equinox of date
Star training set for 22149_00WD49, (2025/11/29 20:13UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 24.71 153 4Gam Crv 12:15:48.1 -17:32:30 2.6 6.90 161 27Zet Crt 11:44:45.8 -18:21:03 4.7 0.64 162 PPM 224968 11:49:38.1 -17:36:57 8.3 0.74 162 PPM 224896 11:46:44.6 -17:51:46 9.6 0.10 162 22149_00WD49 11:46:52.2 -17:57:14 15.9 162 Positions are for J2000