Occultation event with (18046) 99RN116, event index number 4977
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/12/01 09:18:09 UTC
J2000 position of star is 04:42:42.1 -18:05:46
Equinox of date position of star is 04:43:53.8 -18:02:49
Star is 93 degrees from the moon. Moon is 49% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 4.1 per integration for unocculted signal
Expected flux drop is 49% with SNR of 2.0 for the occulted depth (per occulted point)
Apparent velocity is 17.3 km/sec on the sky relative to the star, or, 19.2 arcsec/hr.
Position angle of asteroid motion is 80.7 degrees
The recommended exposure time corresponds to 10.4 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 23.4 km.
The sky-plane scale is 3253.0 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, (2026/12/01 09:18UT) Object RA Dec mag sep mel Rigel 05:15:50.0 -08:10:21 0.1 12.56 84 Nihal 05:29:24.0 -20:44:23 2.8 11.06 83 58 Eri 04:48:48.9 -16:53:13 5.6 1.65 92 PPM 214662 04:41:37.7 -17:37:59 8.2 0.68 93 PPM 214714 04:43:55.0 -17:53:37 8.9 0.15 93 18046_99RN116 04:43:53.8 -18:02:49 15.7 93 Positions are for equinox of date
Star training set for 18046_99RN116, (2026/12/01 09:18UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 12.56 84 Nihal 05:28:14.7 -20:45:36 2.8 11.06 83 58 Eri 04:47:36.5 -16:56:00 5.6 1.65 92 PPM 214662 04:40:25.7 -17:41:01 8.2 0.68 93 PPM 214714 04:42:43.3 -17:56:34 8.9 0.15 93 18046_99RN116 04:42:42.1 -18:05:46 15.7 93 Positions are for J2000