Occultation event with (22149) 00WD49, event index number 766
Regions able to see the event: Australia
Geocentric closest approach at 2025/03/06 10:13:41 UTC
J2000 position of star is 09:25:09.9 -01:47:23
Equinox of date position of star is 09:26:26.6 -01:53:58
Star is 74 degrees from the moon. Moon is 47% illuminated.
Stellar brightness G=12.0, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
Expected flux drop is 5% with SNR of 21.8 per integration
Apparent velocity is 15.2 km/sec on the sky relative to the star, or, 18.7 arcsec/hr.
The recommended exposure time corresponds to 1.8 km per image.
The 1-sigma error in the time of the event is 2.7 seconds.
The 1-sigma cross-track error in the shadow position is 32.1 km.
The sky-plane scale is 2923.1 km/arcsec.
Diameter estimates:
51.0 km assuming a 5% albedo, aximum of 3.4 sec for a central chord
20.8 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 51.0 km used for deployment plan.
Star training set for 22149_00WD49, (2025/03/06 10:14UT) Object RA Dec mag sep mel Regulus 10:09:42.6 +11:50:35 1.3 17.45 77 Alphard 09:28:49.5 -08:46:08 2.0 6.90 78 PPM 177884 09:30:40.9 -02:18:59 6.4 1.14 75 PPM 177857 09:27:20.7 -01:20:42 7.4 0.60 74 PPM 177854 09:26:48.9 -02:07:06 9.6 0.24 74 22149_00WD49 09:26:26.6 -01:53:58 15.1 74 Positions are for equinox of date
Star training set for 22149_00WD49, (2025/03/06 10:14UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 17.45 77 Alphard 09:27:35.2 -08:39:30 2.0 6.90 78 PPM 177884 09:29:24.3 -02:12:19 6.4 1.14 75 PPM 177857 09:26:03.8 -01:14:06 7.4 0.60 74 PPM 177854 09:25:32.3 -02:00:31 9.6 0.24 74 22149_00WD49 09:25:09.9 -01:47:23 15.1 74 Positions are for J2000