Occultation event with (16099) 99VQ24, event index number 3790
Regions able to see the event: US,SAmericaN
Geocentric closest approach at 2026/06/13 02:07:19 UTC
J2000 position of star is 11:47:19.5 +16:11:29
Equinox of date position of star is 11:48:41.4 +16:02:40
Star is 115 degrees from the moon. Moon is 6% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=16.7
Use an exposure time of 0.70 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 61% with SNR of 1.8 for the occulted depth (per occulted point)
Apparent velocity is 13.8 km/sec on the sky relative to the star, or, 12.3 arcsec/hr.
Position angle of asteroid motion is 140.5 degrees
The recommended exposure time corresponds to 9.6 km per image.
The 1-sigma error in the time of the event is 2.6 seconds.
The 1-sigma cross-track error in the shadow position is 12.3 km.
The sky-plane scale is 4010.9 km/arcsec.
Diameter estimates:
41.9 km assuming a 5% albedo, maximum of 3.0 sec for a central chord
17.1 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 36.8 km used for deployment plan.
Star training set for 16099_99VQ24, (2026/06/13 02:07UT) Object RA Dec mag sep mel Regulus 10:09:46.7 +11:50:13 1.3 24.35 97 Denebola 11:50:24.5 +14:25:27 2.1 1.67 117 PPM 128581 11:50:36.6 +16:05:43 6.3 0.46 116 PPM 128574 11:50:23.6 +15:59:08 7.7 0.41 116 PPM 128551 11:48:21.8 +16:03:46 9.1 0.08 115 16099_99VQ24 11:48:41.4 +16:02:40 16.7 116 Positions are for equinox of date
Star training set for 16099_99VQ24, (2026/06/13 02:07UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 24.35 97 Denebola 11:49:02.7 +14:34:16 2.1 1.67 117 PPM 128581 11:49:14.9 +16:14:33 6.3 0.46 116 PPM 128574 11:49:01.8 +16:07:57 7.7 0.41 116 PPM 128551 11:46:59.9 +16:12:35 9.1 0.08 115 16099_99VQ24 11:47:19.5 +16:11:29 16.7 115 Positions are for J2000