Occultation event with (5119) Imbrius, event index number 5171
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/12/11 06:43:25 UTC
J2000 position of star is 05:54:05.8 +38:29:46
Equinox of date position of star is 05:55:57.3 +38:29:57
Star is 161 degrees from the moon. Moon is 5% illuminated.
Stellar brightness G=14.4, apparent brightess of occulting body is G=15.3
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 10.0 per integration for unocculted signal
Expected flux drop is 71% with SNR of 7.1 for the occulted depth (per occulted point)
Apparent velocity is 17.5 km/sec on the sky relative to the star, or, 19.7 arcsec/hr.
Position angle of asteroid motion is 85.8 degrees
The recommended exposure time corresponds to 7.9 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 31.9 km.
The sky-plane scale is 3194.3 km/arcsec.
Diameter estimates:
51.8 km assuming a 5% albedo, maximum of 3.0 sec for a central chord
21.1 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 49.3 km used for deployment plan.
Star training set for 5119_Imbrius, (2026/12/11 06:43UT) Object RA Dec mag sep mel Pollux 07:46:57.7 +27:57:32 1.1 25.36 170 34Bet Aur 06:01:30.4 +44:56:50 1.9 6.53 157 32Nu Aur 05:53:21.5 +39:09:13 4.0 0.83 160 PPM 070943 05:54:05.4 +38:33:51 7.2 0.37 161 PPM 070964 05:55:08.2 +38:17:50 8.9 0.26 161 5119_Imbrius 05:55:57.3 +38:29:57 15.3 161 Positions are for equinox of date
Star training set for 5119_Imbrius, (2026/12/11 06:43UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 25.36 170 34Bet Aur 05:59:31.6 +44:56:51 1.9 6.53 157 32Nu Aur 05:51:29.4 +39:08:55 4.0 0.83 160 PPM 070943 05:52:13.9 +38:33:35 7.2 0.37 161 PPM 070964 05:53:16.9 +38:17:36 8.9 0.26 161 5119_Imbrius 05:54:05.8 +38:29:46 15.3 161 Positions are for J2000