Occultation event with (13060) 91EJ, event index number 810
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/03/15 05:00:19 UTC
J2000 position of star is 08:47:48.6 -01:03:55
Equinox of date position of star is 08:49:05.6 -01:09:34
Star is 52 degrees from the moon. Moon is 99% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=16.2
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
Expected flux drop is 52% with SNR of 3.4 per integration
Apparent velocity is 11.8 km/sec on the sky relative to the star, or, 12.4 arcsec/hr.
The recommended exposure time corresponds to 10.0 km per image.
The 1-sigma error in the time of the event is 3.2 seconds.
The 1-sigma cross-track error in the shadow position is 32.5 km.
The sky-plane scale is 3405.0 km/arcsec.
Diameter estimates:
41.7 km assuming a 5% albedo, aximum of 3.5 sec for a central chord
17.0 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 41.7 km used for deployment plan.
Star training set for 13060_91EJ, (2025/03/15 05:00UT) Object RA Dec mag sep mel Regulus 10:09:42.7 +11:50:35 1.3 23.87 35 Alphard 09:28:49.6 -08:46:09 2.0 12.48 43 PPM 177601 08:48:31.6 -01:59:27 5.3 0.84 52 PPM 177610 08:49:54.4 -01:08:21 7.5 0.20 52 PPM 177602 08:48:45.1 -01:11:29 8.8 0.09 52 13060_91EJ 08:49:05.6 -01:09:34 16.2 52 Positions are for equinox of date
Star training set for 13060_91EJ, (2025/03/15 05:00UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 23.87 35 Alphard 09:27:35.2 -08:39:30 2.0 12.48 43 PPM 177601 08:47:14.9 -01:53:49 5.3 0.84 52 PPM 177610 08:48:37.4 -01:02:41 7.5 0.20 52 PPM 177602 08:47:28.1 -01:05:51 8.8 0.09 52 13060_91EJ 08:47:48.6 -01:03:55 16.2 52 Positions are for J2000