Occultation event with (5119) Imbrius, event index number 5146
Regions able to see the event: Europe
Geocentric closest approach at 2026/12/09 23:12:09 UTC
J2000 position of star is 05:54:58.5 +38:30:25
Equinox of date position of star is 05:56:50.0 +38:30:35
Star is 169 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=15.3
Use an exposure time of 0.70 seconds with the standard RECON-QHY system.
SNR of 5.5 per integration for unocculted signal
Expected flux drop is 47% with SNR of 2.6 for the occulted depth (per occulted point)
Apparent velocity is 17.4 km/sec on the sky relative to the star, or, 19.6 arcsec/hr.
Position angle of asteroid motion is 86.5 degrees
The recommended exposure time corresponds to 12.2 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 31.6 km.
The sky-plane scale is 3196.3 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, (2026/12/09 23:12UT) Object RA Dec mag sep mel Pollux 07:46:57.7 +27:57:32 1.1 25.20 155 34Bet Aur 06:01:30.4 +44:56:50 1.9 6.50 163 32Nu Aur 05:53:21.5 +39:09:13 4.0 0.93 168 PPM 071021 05:58:21.7 +38:27:19 8.4 0.30 169 5119_Imbrius 05:56:50.0 +38:30:35 15.3 169 Positions are for equinox of date
Star training set for 5119_Imbrius, (2026/12/09 23:12UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 25.20 155 34Bet Aur 05:59:31.6 +44:56:51 1.9 6.50 163 32Nu Aur 05:51:29.4 +39:08:55 4.0 0.93 168 PPM 071021 05:56:30.3 +38:27:13 8.4 0.30 169 5119_Imbrius 05:54:58.5 +38:30:25 15.3 169 Positions are for J2000