Occultation event with (22014) 99XQ96, event index number 1557
Regions able to see the event: Japan
Geocentric closest approach at 2025/11/20 20:46:22 UTC
J2000 position of star is 11:19:15.2 -25:18:57
Equinox of date position of star is 11:20:31.9 -25:27:28
Star is 64 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=14.7, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.30 seconds with the standard RECON-QHY system.
SNR of 6.0 per integration for unocculted signal
Expected flux drop is 73% with SNR of 4.4 for the occulted depth (per occulted point)
Apparent velocity is 31.2 km/sec on the sky relative to the star, or, 29.3 arcsec/hr.
Position angle of asteroid motion is 135.6 degrees
The recommended exposure time corresponds to 9.4 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 15.9 km.
The sky-plane scale is 3836.1 km/arcsec.
Diameter estimates:
54.5 km assuming a 5% albedo, aximum of 1.7 sec for a central chord
22.2 km assuming a 30% albedo, maximum of 0.7 sec for a central chord
Cross-track diameter of 39.5 km used for deployment plan.
Star training set for 22014_99XQ96, (2025/11/20 20:46UT) Object RA Dec mag sep mel Spica 13:26:33.6 -11:17:44 1.0 32.96 41 4Gam Crv 12:17:08.5 -17:41:08 2.6 15.27 54 PPM 258671 11:13:13.8 -26:56:49 6.5 2.21 65 PPM 258905 11:23:33.1 -25:20:13 8.1 0.69 64 PPM 258833 11:20:17.4 -25:22:05 8.9 0.11 64 22014_99XQ96 11:20:31.9 -25:27:28 15.7 64 Positions are for equinox of date
Star training set for 22014_99XQ96, (2025/11/20 20:46UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 32.96 41 4Gam Crv 12:15:48.1 -17:32:30 2.6 15.27 54 PPM 258671 11:11:57.8 -26:48:21 6.5 2.21 65 PPM 258905 11:22:16.1 -25:11:41 8.1 0.69 64 PPM 258833 11:19:00.6 -25:13:34 8.9 0.11 64 22014_99XQ96 11:19:15.2 -25:18:57 15.7 64 Positions are for J2000