Occultation event with (5119) Imbrius, event index number 3169
Regions able to see the event: Australia
Geocentric closest approach at 2026/01/24 12:41:22 UTC
J2000 position of star is 02:43:45.3 +33:21:16
Equinox of date position of star is 02:45:20.5 +33:27:49
Star is 38 degrees from the moon. Moon is 32% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=15.7
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
SNR of 3.5 per integration for unocculted signal
Expected flux drop is 34% with SNR of 1.2 for the occulted depth (per occulted point)
Apparent velocity is 10.1 km/sec on the sky relative to the star, or, 10.5 arcsec/hr.
Position angle of asteroid motion is 128.8 degrees
The recommended exposure time corresponds to 12.1 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 29.1 km.
The sky-plane scale is 3452.1 km/arcsec.
Diameter estimates:
51.8 km assuming a 5% albedo, maximum of 5.1 sec for a central chord
21.1 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 49.3 km used for deployment plan.
Star training set for 5119_Imbrius, (2026/01/24 12:41UT) Object RA Dec mag sep mel Aldebaran 04:37:25.2 +16:33:34 0.8 30.34 57 Algol 03:09:52.5 +41:03:15 2.1 9.02 46 17 Per 02:53:07.7 +35:09:55 5.8 2.34 40 PPM 067649 02:44:10.7 +33:52:38 8.4 0.48 38 PPM 067681 02:45:49.9 +33:23:23 9.4 0.13 38 PPM 067673 02:45:36.2 +33:34:02 10.7 0.12 38 5119_Imbrius 02:45:20.5 +33:27:49 15.7 38 Positions are for equinox of date
Star training set for 5119_Imbrius, (2026/01/24 12:41UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 30.34 57 Algol 03:08:10.1 +40:57:20 2.1 9.02 46 17 Per 02:51:30.9 +35:03:34 5.8 2.34 40 PPM 067649 02:42:35.3 +33:46:02 8.4 0.48 38 PPM 067681 02:44:14.7 +33:16:50 9.4 0.13 38 PPM 067673 02:44:00.9 +33:27:29 10.7 0.12 38 5119_Imbrius 02:43:45.3 +33:21:16 15.7 38 Positions are for J2000