Occultation event with (5119) Imbrius, event index number 4249
Regions able to see the event: Europe
Geocentric closest approach at 2026/09/16 22:26:00 UTC
J2000 position of star is 06:06:16.9 +36:48:04
Equinox of date position of star is 06:08:05.7 +36:47:47
Star is 151 degrees from the moon. Moon is 32% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=16.1
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 4.6 per integration for unocculted signal
Expected flux drop is 56% with SNR of 2.6 for the occulted depth (per occulted point)
Apparent velocity is 16.1 km/sec on the sky relative to the star, or, 15.0 arcsec/hr.
Position angle of asteroid motion is 75.0 degrees
The recommended exposure time corresponds to 12.1 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 30.7 km.
The sky-plane scale is 3855.9 km/arcsec.
Diameter estimates:
51.8 km assuming a 5% albedo, maximum of 3.2 sec for a central chord
21.1 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 49.3 km used for deployment plan.
Star training set for 5119_Imbrius, (2026/09/16 22:26UT) Object RA Dec mag sep mel Pollux 07:46:56.8 +27:57:34 1.1 22.58 130 34Bet Aur 06:01:29.3 +44:56:50 1.9 8.25 149 40 Aur 06:08:25.6 +38:28:39 5.4 1.68 150 PPM 071249 06:09:44.2 +36:03:33 7.8 0.81 151 PPM 071199 06:07:33.6 +36:55:47 9.1 0.17 151 5119_Imbrius 06:08:05.7 +36:47:47 16.1 150 Positions are for equinox of date
Star training set for 5119_Imbrius, (2026/09/16 22:26UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 22.58 130 34Bet Aur 05:59:31.6 +44:56:51 1.9 8.25 149 40 Aur 06:06:35.1 +38:28:56 5.4 1.68 150 PPM 071249 06:07:56.1 +36:03:53 7.8 0.81 151 PPM 071199 06:05:44.7 +36:56:02 9.1 0.17 151 5119_Imbrius 06:06:16.9 +36:48:04 16.1 151 Positions are for J2000