Occultation event with (22014) 99XQ96, event index number 934
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/04/28 22:53:36 UTC
J2000 position of star is 08:33:12.1 -11:11:56
Equinox of date position of star is 08:34:24.8 -11:17:12
Star is 82 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=14.7, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 67% with SNR of 6.4 for the occulted depth (per occulted point)
Apparent velocity is 14.3 km/sec on the sky relative to the star, or, 15.5 arcsec/hr.
Position angle of asteroid motion is 28.3 degrees
The recommended exposure time corresponds to 8.6 km per image.
The 1-sigma error in the time of the event is 2.0 seconds.
The 1-sigma cross-track error in the shadow position is 22.9 km.
The sky-plane scale is 3304.1 km/arcsec.
Diameter estimates:
54.0 km assuming a 5% albedo, aximum of 3.8 sec for a central chord
22.0 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 54.0 km used for deployment plan.
Star training set for 22014_99XQ96, (2025/04/28 22:54UT) Object RA Dec mag sep mel Sirius 06:46:15.8 -16:45:09 -1.5 26.77 63 Alphard 09:28:49.9 -08:46:11 2.0 13.63 94 PPM 191392 08:30:04.2 -09:50:03 6.1 1.80 81 PPM 220253 08:33:41.7 -11:29:31 8.0 0.27 82 22014_99XQ96 08:34:24.8 -11:17:12 15.5 83 Positions are for equinox of date
Star training set for 22014_99XQ96, (2025/04/28 22:54UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:28 -1.5 26.77 63 Alphard 09:27:35.2 -08:39:30 2.0 13.63 94 PPM 191392 08:28:51.0 -09:44:55 6.1 1.80 81 PPM 220253 08:32:29.2 -11:24:17 8.0 0.27 82 22014_99XQ96 08:33:12.1 -11:11:56 15.5 82 Positions are for J2000