Occultation event with (18046) 99RN116, event index number 1601
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/11/27 05:14:42 UTC
J2000 position of star is 02:14:27.2 -18:50:48
Equinox of date position of star is 02:15:40.3 -18:43:37
Star is 65 degrees from the moon. Moon is 39% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 6.4 per integration for unocculted signal
Expected flux drop is 53% with SNR of 3.4 for the occulted depth (per occulted point)
Apparent velocity is 11.5 km/sec on the sky relative to the star, or, 13.0 arcsec/hr.
Position angle of asteroid motion is 89.7 degrees
The recommended exposure time corresponds to 10.4 km per image.
The 1-sigma error in the time of the event is 0.1 seconds.
The 1-sigma cross-track error in the shadow position is 22.3 km.
The sky-plane scale is 3206.3 km/arcsec.
Diameter estimates:
48.1 km assuming a 5% albedo, aximum of 4.2 sec for a central chord
19.6 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 42.7 km used for deployment plan.
Star training set for 18046_99RN116, (2025/11/27 05:15UT) Object RA Dec mag sep mel Rigel 05:15:47.0 -08:10:25 0.1 44.91 110 68Omi Cet 02:20:39.4 -02:51:41 2.0 15.91 69 PPM 211081 02:08:05.7 -19:01:00 6.5 1.82 63 PPM 211287 02:16:59.4 -18:07:11 8.0 0.68 65 PPM 211274 02:16:38.3 -18:29:43 9.6 0.33 65 18046_99RN116 02:15:40.3 -18:43:37 15.7 65 Positions are for equinox of date
Star training set for 18046_99RN116, (2025/11/27 05:15UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 44.91 110 68Omi Cet 02:19:20.8 -02:58:46 2.0 15.91 69 PPM 211081 02:06:52.3 -19:08:21 6.5 1.82 63 PPM 211287 02:15:46.1 -18:14:21 8.0 0.68 65 PPM 211274 02:15:25.1 -18:36:53 9.6 0.33 65 18046_99RN116 02:14:27.2 -18:50:48 15.7 65 Positions are for J2000