Occultation event with (5130) Ilioneus, event index number 4950
Regions able to see the event: Europe,SAmericaN
Geocentric closest approach at 2026/11/29 21:57:52 UTC
J2000 position of star is 02:36:48.3 +20:34:32
Equinox of date position of star is 02:38:19.7 +20:41:29
Star is 97 degrees from the moon. Moon is 65% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=14.7
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 16% with SNR of 0.5 for the occulted depth (per occulted point)
Apparent velocity is 15.4 km/sec on the sky relative to the star, or, 18.1 arcsec/hr.
Position angle of asteroid motion is 55.1 degrees
The recommended exposure time corresponds to 20.0 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 21.1 km.
The sky-plane scale is 3072.7 km/arcsec.
Diameter estimates:
65.8 km assuming a 5% albedo, maximum of 4.3 sec for a central chord
26.9 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 60.7 km used for deployment plan.
Star training set for 5130_Ilioneus, (2026/11/29 21:58UT) Object RA Dec mag sep mel Aldebaran 04:37:28.1 +16:33:40 0.8 28.48 71 Hamal 02:08:41.8 +23:35:18 2.0 7.45 103 34Mu Ari 02:43:53.3 +20:07:29 5.7 1.42 96 PPM 091829 02:38:15.0 +20:48:58 8.5 0.13 97 5130_Ilioneus 02:38:19.7 +20:41:29 14.7 97 Positions are for equinox of date
Star training set for 5130_Ilioneus, (2026/11/29 21:58UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 28.48 71 Hamal 02:07:10.8 +23:27:41 2.0 7.45 103 34Mu Ari 02:42:22.0 +20:00:40 5.7 1.42 96 PPM 091829 02:36:43.6 +20:42:01 8.5 0.13 97 5130_Ilioneus 02:36:48.3 +20:34:32 14.7 97 Positions are for J2000