Occultation event with (11089) 94CS8, event index number 5207
Regions able to see the event: Australia
Geocentric closest approach at 2026/12/13 09:43:57 UTC
J2000 position of star is 02:26:30.5 +06:12:05
Equinox of date position of star is 02:27:55.8 +06:19:17
Star is 88 degrees from the moon. Moon is 16% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 71% with SNR of 6.9 for the occulted depth (per occulted point)
Apparent velocity is 9.0 km/sec on the sky relative to the star, or, 10.1 arcsec/hr.
Position angle of asteroid motion is 91.1 degrees
The recommended exposure time corresponds to 7.6 km per image.
The 1-sigma error in the time of the event is 0.8 seconds.
The 1-sigma cross-track error in the shadow position is 22.4 km.
The sky-plane scale is 3214.5 km/arcsec.
Diameter estimates:
42.3 km assuming a 5% albedo, maximum of 4.7 sec for a central chord
17.3 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 37.0 km used for deployment plan.
Star training set for 11089_94CS8, (2026/12/13 09:44UT) Object RA Dec mag sep mel Aldebaran 04:37:28.2 +16:33:41 0.8 33.29 121 Menkar 03:03:41.5 +04:11:38 2.5 9.15 95 73Xi 2Cet 02:29:35.7 +08:34:46 4.3 2.30 89 PPM 145587 02:27:41.7 +06:24:45 6.9 0.11 88 11089_94CS8 02:27:55.8 +06:19:17 15.9 88 Positions are for equinox of date
Star training set for 11089_94CS8, (2026/12/13 09:44UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 33.29 121 Menkar 03:02:16.8 +04:05:21 2.5 9.15 95 73Xi 2Cet 02:28:09.6 +08:27:36 4.3 2.30 89 PPM 145587 02:26:16.4 +06:17:32 6.9 0.11 88 11089_94CS8 02:26:30.5 +06:12:05 15.9 88 Positions are for J2000