Occultation event with (2363) Cebriones, event index number 5126
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/12/09 02:52:27 UTC
J2000 position of star is 05:49:04.6 -08:40:06
Equinox of date position of star is 05:50:21.9 -08:39:42
Star is 142 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=9.7, apparent brightess of occulting body is G=14.3
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 62.5 per integration for unocculted signal
Expected flux drop is 99% with SNR of 61.6 for the occulted depth (per occulted point)
Apparent velocity is 19.0 km/sec on the sky relative to the star, or, 20.6 arcsec/hr.
Position angle of asteroid motion is 68.8 degrees
The recommended exposure time corresponds to 2.3 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 35.9 km.
The sky-plane scale is 3324.3 km/arcsec.
Diameter estimates:
93.8 km assuming a 5% albedo, maximum of 4.9 sec for a central chord
38.3 km assuming a 30% albedo, maximum of 2.0 sec for a central chord
Cross-track diameter of 96.0 km used for deployment plan.
Star training set for 2363_Cebriones, (2026/12/09 02:52UT) Object RA Dec mag sep mel Rigel 05:15:50.0 -08:10:21 0.1 8.55 144 Saiph 05:49:02.1 -09:39:43 2.1 1.05 142 55 Ori 05:52:40.1 -07:30:46 5.3 1.28 143 PPM 188475 05:49:57.3 -08:55:31 8.3 0.28 142 PPM 188492 05:51:15.1 -08:46:13 9.6 0.24 142 2363_Cebriones 05:50:21.9 -08:39:42 14.3 142 Positions are for equinox of date
This table contains the target star visibility for registered SAmericaS sites that are relevant for this occultation. This list has been filtered to only those sites that can see the field and are within range of the shadow given the uncertainties. The observing time range has been calculated to cover the time of the event at each site with allowances for the event timing uncertainty plus time for obtaining a pre and post event baseline lightcurve. This set of stations has a 0.0 % chance of getting at least one chord. There is a 0.0% chance of 2 or more chords assuming clear weather for all.
| Site Name | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time | Xtrack (km) |
Prob |
|---|---|---|---|---|---|---|---|---|---|---|
Star training set for 2363_Cebriones, (2026/12/09 02:52UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 8.55 144 Saiph 05:47:45.4 -09:40:11 2.1 1.05 142 55 Ori 05:51:22.0 -07:31:05 5.3 1.28 143 PPM 188475 05:48:40.1 -08:55:56 8.3 0.28 142 PPM 188492 05:49:57.9 -08:46:35 9.6 0.24 142 2363_Cebriones 05:49:04.6 -08:40:06 14.3 142 Positions are for J2000