Occultation event with (18046) 99RN116, event index number 4649
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/11/11 22:40:34 UTC
J2000 position of star is 04:52:25.4 -17:14:06
Equinox of date position of star is 04:53:37.3 -17:11:31
Star is 135 degrees from the moon. Moon is 7% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 36% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 17.1 km/sec on the sky relative to the star, or, 18.8 arcsec/hr.
Position angle of asteroid motion is 58.1 degrees
The recommended exposure time corresponds to 14.5 km per image.
The 1-sigma error in the time of the event is 0.9 seconds.
The 1-sigma cross-track error in the shadow position is 19.0 km.
The sky-plane scale is 3268.8 km/arcsec.
Diameter estimates:
48.1 km assuming a 5% albedo, maximum of 2.8 sec for a central chord
19.6 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 42.7 km used for deployment plan.
Star training set for 18046_99RN116, (2026/11/11 22:41UT) Object RA Dec mag sep mel Rigel 05:15:49.8 -08:10:21 0.1 10.52 144 Nihal 05:29:23.8 -20:44:23 2.8 9.17 131 PPM 215006 04:56:19.1 -16:41:58 5.7 0.81 136 PPM 214968 04:54:15.8 -16:55:20 8.3 0.31 135 PPM 214941 04:53:12.9 -17:00:50 9.1 0.20 135 18046_99RN116 04:53:37.3 -17:11:31 15.7 135 Positions are for equinox of date
Star training set for 18046_99RN116, (2026/11/11 22:41UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 10.52 144 Nihal 05:28:14.7 -20:45:36 2.8 9.17 131 PPM 215006 04:55:06.8 -16:44:27 5.7 0.81 136 PPM 214968 04:53:03.7 -16:57:54 8.3 0.31 135 PPM 214941 04:52:00.8 -17:03:26 9.1 0.20 135 18046_99RN116 04:52:25.4 -17:14:06 15.7 135 Positions are for J2000