Occultation event with (5119) Imbrius, event index number 1294
Regions able to see the event: Australia
Geocentric closest approach at 2025/09/17 19:02:29 UTC
J2000 position of star is 03:28:31.6 +37:14:40
Equinox of date position of star is 03:30:11.4 +37:19:55
Star is 68 degrees from the moon. Moon is 16% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=15.6
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 60% with SNR of 5.9 for the occulted depth (per occulted point)
Apparent velocity is 7.2 km/sec on the sky relative to the star, or, 8.0 arcsec/hr.
Position angle of asteroid motion is 163.5 degrees
The recommended exposure time corresponds to 7.6 km per image.
The 1-sigma error in the time of the event is 3.7 seconds.
The 1-sigma cross-track error in the shadow position is 14.2 km.
The sky-plane scale is 3252.1 km/arcsec.
Diameter estimates:
51.8 km assuming a 5% albedo, aximum of 7.2 sec for a central chord
21.1 km assuming a 30% albedo, maximum of 2.9 sec for a central chord
Cross-track diameter of 49.3 km used for deployment plan.
Star training set for 5119_Imbrius, (2025/09/17 19:02UT) Object RA Dec mag sep mel Aldebaran 04:37:23.9 +16:33:32 0.8 25.52 58 Algol 03:09:51.1 +41:03:10 2.1 5.42 72 PPM 068561 03:34:18.7 +35:32:50 5.9 1.97 68 PPM 068455 03:28:02.0 +37:06:05 8.0 0.49 69 PPM 068496 03:30:19.4 +37:11:44 8.8 0.14 68 5119_Imbrius 03:30:11.4 +37:19:55 15.6 68 Positions are for equinox of date
Star training set for 5119_Imbrius, (2025/09/17 19:02UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 25.52 58 Algol 03:08:10.1 +40:57:20 2.1 5.42 72 PPM 068561 03:32:40.0 +35:27:42 5.9 1.97 68 PPM 068455 03:26:22.6 +37:00:47 8.0 0.49 69 PPM 068496 03:28:39.7 +37:06:29 8.8 0.14 68 5119_Imbrius 03:28:31.6 +37:14:40 15.6 68 Positions are for J2000