Occultation event with (22014) 99XQ96, event index number 933
Regions able to see the event: Australia
Geocentric closest approach at 2025/04/28 12:57:15 UTC
J2000 position of star is 08:33:02.9 -11:13:08
Equinox of date position of star is 08:34:15.5 -11:18:24
Star is 88 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=16.8, apparent brightess of occulting body is G=15.5
Use an exposure time of 1.55 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 23% with SNR of 0.7 for the occulted depth (per occulted point)
Apparent velocity is 14.1 km/sec on the sky relative to the star, or, 15.4 arcsec/hr.
Position angle of asteroid motion is 16.4 degrees
The recommended exposure time corresponds to 21.9 km per image.
The 1-sigma error in the time of the event is 2.1 seconds.
The 1-sigma cross-track error in the shadow position is 21.2 km.
The sky-plane scale is 3300.0 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 1.6 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 12:57UT) Object RA Dec mag sep mel Sirius 06:46:15.8 -16:45:09 -1.5 26.73 67 Alphard 09:28:49.9 -08:46:11 2.0 13.67 99 PPM 191392 08:30:04.2 -09:50:03 6.1 1.80 86 PPM 220253 08:33:41.7 -11:29:31 8.0 0.23 88 22014_99XQ96 08:34:15.5 -11:18:24 15.5 88 Positions are for equinox of date
Star training set for 22014_99XQ96, (2025/04/28 12:57UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:28 -1.5 26.73 67 Alphard 09:27:35.2 -08:39:30 2.0 13.67 99 PPM 191392 08:28:51.0 -09:44:55 6.1 1.80 86 PPM 220253 08:32:29.2 -11:24:17 8.0 0.23 88 22014_99XQ96 08:33:02.9 -11:13:08 15.5 88 Positions are for J2000