Occultation event with (12126) 99RM11, event index number 4924
Regions able to see the event: Australia
Geocentric closest approach at 2026/11/28 17:28:43 UTC
J2000 position of star is 05:01:29.3 +25:12:16
Equinox of date position of star is 05:03:08.5 +25:14:30
Star is 47 degrees from the moon. Moon is 77% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.70 seconds with the standard RECON-QHY system.
SNR of 3.9 per integration for unocculted signal
Expected flux drop is 41% with SNR of 1.6 for the occulted depth (per occulted point)
Apparent velocity is 18.5 km/sec on the sky relative to the star, or, 18.6 arcsec/hr.
Position angle of asteroid motion is 85.0 degrees
The recommended exposure time corresponds to 13.0 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 28.3 km.
The sky-plane scale is 3588.9 km/arcsec.
Diameter estimates:
56.5 km assuming a 5% albedo, maximum of 3.0 sec for a central chord
23.1 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 53.2 km used for deployment plan.
Star training set for 12126_99RM11, (2026/11/28 17:29UT) Object RA Dec mag sep mel Aldebaran 04:37:28.1 +16:33:40 0.8 10.55 54 Alnath 05:27:59.7 +28:37:39 1.6 6.49 41 98 Tau 04:59:48.4 +25:05:22 5.8 0.77 48 PPM 093945 05:01:16.1 +25:58:25 8.2 0.84 47 PPM 093958 05:01:56.7 +25:10:28 8.8 0.28 47 PPM 093966 05:02:24.9 +25:01:56 10.8 0.27 47 12126_99RM11 05:03:08.5 +25:14:30 15.5 47 Positions are for equinox of date
Star training set for 12126_99RM11, (2026/11/28 17:29UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 10.55 54 Alnath 05:26:17.6 +28:36:22 1.6 6.49 41 98 Tau 04:58:09.4 +25:03:00 5.8 0.77 48 PPM 093945 04:59:36.4 +25:56:06 8.2 0.84 47 PPM 093958 05:00:17.6 +25:08:11 8.8 0.28 47 PPM 093966 05:00:45.9 +24:59:40 10.8 0.27 47 12126_99RM11 05:01:29.3 +25:12:16 15.5 47 Positions are for J2000