Occultation event with (5025) Mecisteus, event index number 788
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/03/10 05:15:52 UTC
J2000 position of star is 09:27:33.7 +20:46:32
Equinox of date position of star is 09:28:59.0 +20:39:54
Star is 14 degrees from the moon. Moon is 84% illuminated.
Stellar brightness G=14.2, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.35 seconds with the standard RECON-QHY system.
Expected flux drop is 26% with SNR of 9.3 per integration
Apparent velocity is 13.1 km/sec on the sky relative to the star, or, 15.4 arcsec/hr.
The recommended exposure time corresponds to 4.6 km per image.
The 1-sigma error in the time of the event is 3.3 seconds.
The 1-sigma cross-track error in the shadow position is 22.5 km.
The sky-plane scale is 3067.2 km/arcsec.
Diameter estimates:
49.7 km assuming a 5% albedo, aximum of 3.8 sec for a central chord
20.3 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 49.7 km used for deployment plan.
Star training set for 5025_Mecisteus, (2025/03/10 05:16UT) Object RA Dec mag sep mel Regulus 10:09:42.6 +11:50:35 1.3 13.16 27 4Lam Leo 09:33:09.2 +22:51:20 4.3 2.40 15 PPM 099541 09:25:12.1 +20:15:20 8.1 0.98 14 PPM 099605 09:30:09.3 +20:35:45 10.0 0.28 15 5025_Mecisteus 09:28:59.0 +20:39:54 15.4 15 Positions are for equinox of date
Star training set for 5025_Mecisteus, (2025/03/10 05:16UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 13.16 27 4Lam Leo 09:31:43.2 +22:58:04 4.3 2.40 15 PPM 099541 09:23:46.8 +20:21:53 8.1 0.98 14 PPM 099605 09:28:44.1 +20:42:25 10.0 0.28 15 5025_Mecisteus 09:27:33.7 +20:46:32 15.4 14 Positions are for J2000