Occultation event with (5119) Imbrius, event index number 1071
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/06/18 09:12:18 UTC
J2000 position of star is 02:42:05.2 +30:11:38
Equinox of date position of star is 02:43:36.4 +30:18:05
Star is 57 degrees from the moon. Moon is 55% illuminated.
Stellar brightness G=13.7, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.20 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 88% with SNR of 8.5 for the occulted depth (per occulted point)
Apparent velocity is 36.4 km/sec on the sky relative to the star, or, 32.1 arcsec/hr.
The recommended exposure time corresponds to 7.3 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 30.2 km.
The sky-plane scale is 4080.1 km/arcsec.
Diameter estimates:
51.8 km assuming a 5% albedo, aximum of 1.4 sec for a central chord
21.1 km assuming a 30% albedo, maximum of 0.6 sec for a central chord
Cross-track diameter of 51.8 km used for deployment plan.
Star training set for 5119_Imbrius, (2025/06/18 09:12UT) Object RA Dec mag sep mel Aldebaran 04:37:23.1 +16:33:30 0.8 29.37 78 Hamal 02:08:36.9 +23:34:54 2.0 10.29 47 39 Ari 02:49:26.0 +29:21:04 5.6 1.58 57 PPM 067638 02:43:32.6 +31:02:35 7.9 0.74 57 PPM 067640 02:43:34.6 +30:14:01 10.9 0.07 57 5119_Imbrius 02:43:36.4 +30:18:05 15.9 57 Positions are for equinox of date
Star training set for 5119_Imbrius, (2025/06/18 09:12UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 29.37 78 Hamal 02:07:10.8 +23:27:41 2.0 10.29 47 39 Ari 02:47:54.9 +29:14:46 5.6 1.58 57 PPM 067638 02:42:00.9 +30:56:08 7.9 0.74 57 PPM 067640 02:42:03.4 +30:07:34 10.9 0.07 57 5119_Imbrius 02:42:05.2 +30:11:38 15.9 57 Positions are for J2000