Occultation event with (16099) 99VQ24, event index number 3780
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/06/05 00:59:45 UTC
J2000 position of star is 11:45:53.9 +16:40:22
Equinox of date position of star is 11:47:15.8 +16:31:34
Star is 135 degrees from the moon. Moon is 81% illuminated.
Stellar brightness G=13.5, apparent brightess of occulting body is G=16.7
Use an exposure time of 0.16 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 95% with SNR of 9.1 for the occulted depth (per occulted point)
Apparent velocity is 10.6 km/sec on the sky relative to the star, or, 9.7 arcsec/hr.
Position angle of asteroid motion is 149.9 degrees
The recommended exposure time corresponds to 1.7 km per image.
The 1-sigma error in the time of the event is 3.5 seconds.
The 1-sigma cross-track error in the shadow position is 6.7 km.
The sky-plane scale is 3921.4 km/arcsec.
Diameter estimates:
41.9 km assuming a 5% albedo, maximum of 4.0 sec for a central chord
17.1 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 36.8 km used for deployment plan.
Star training set for 16099_99VQ24, (2026/06/05 01:00UT) Object RA Dec mag sep mel Regulus 10:09:46.6 +11:50:13 1.3 24.07 156 Denebola 11:50:24.4 +14:25:27 2.1 2.23 133 PPM 128581 11:50:36.6 +16:05:44 6.3 0.91 134 PPM 128541 11:47:33.1 +16:43:38 9.8 0.21 135 16099_99VQ24 11:47:15.8 +16:31:34 16.7 134 Positions are for equinox of date
Star training set for 16099_99VQ24, (2026/06/05 01:00UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 24.07 156 Denebola 11:49:02.7 +14:34:16 2.1 2.23 133 PPM 128581 11:49:14.9 +16:14:33 6.3 0.91 134 PPM 128541 11:46:11.2 +16:52:27 9.8 0.21 135 16099_99VQ24 11:45:53.9 +16:40:22 16.7 135 Positions are for J2000