Occultation event with (5119) Imbrius, event index number 3343
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/03/03 23:25:48 UTC
J2000 position of star is 03:03:13.5 +32:28:37
Equinox of date position of star is 03:04:50.0 +32:34:41
Star is 116 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=15.4, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 4.8 per integration for unocculted signal
Expected flux drop is 64% with SNR of 3.1 for the occulted depth (per occulted point)
Apparent velocity is 24.5 km/sec on the sky relative to the star, or, 22.6 arcsec/hr.
Position angle of asteroid motion is 91.2 degrees
The recommended exposure time corresponds to 12.2 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 30.1 km.
The sky-plane scale is 3894.6 km/arcsec.
Diameter estimates:
51.8 km assuming a 5% albedo, maximum of 2.1 sec for a central chord
21.1 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 49.3 km used for deployment plan.
Star training set for 5119_Imbrius, (2026/03/03 23:26UT) Object RA Dec mag sep mel Aldebaran 04:37:25.5 +16:33:35 0.8 26.34 99 Algol 03:09:52.9 +41:03:16 2.1 8.54 112 21 Per 02:58:53.1 +32:02:16 5.1 1.37 118 PPM 068062 03:05:54.9 +32:02:46 8.1 0.58 116 PPM 068072 03:06:43.2 +32:39:03 9.5 0.40 116 5119_Imbrius 03:04:50.0 +32:34:41 16.0 116 Positions are for equinox of date
Star training set for 5119_Imbrius, (2026/03/03 23:26UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 26.34 99 Algol 03:08:10.1 +40:57:20 2.1 8.54 112 21 Per 02:57:17.3 +31:56:02 5.1 1.37 118 PPM 068062 03:04:18.7 +31:56:43 8.1 0.58 116 PPM 068072 03:05:06.5 +32:33:02 9.5 0.40 116 5119_Imbrius 03:03:13.5 +32:28:37 16.0 116 Positions are for J2000