Occultation event with (5025) Mecisteus, event index number 735
Regions able to see the event: Europe
Geocentric closest approach at 2025/02/28 04:52:36 UTC
J2000 position of star is 09:32:24.3 +20:41:13
Equinox of date position of star is 09:33:49.2 +20:34:29
Star is 156 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=15.9, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
Expected flux drop is 65% with SNR of 4.2 per integration
Apparent velocity is 15.5 km/sec on the sky relative to the star, or, 18.5 arcsec/hr.
The recommended exposure time corresponds to 12.4 km per image.
The 1-sigma error in the time of the event is 2.7 seconds.
The 1-sigma cross-track error in the shadow position is 25.0 km.
The sky-plane scale is 3014.1 km/arcsec.
Diameter estimates:
49.7 km assuming a 5% albedo, aximum of 3.2 sec for a central chord
20.3 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 49.7 km used for deployment plan.
Star training set for 5025_Mecisteus, (2025/02/28 04:53UT) Object RA Dec mag sep mel Regulus 10:09:42.6 +11:50:36 1.3 12.26 168 4Lam Leo 09:33:09.1 +22:51:21 4.3 2.29 155 PPM 099647 09:32:59.6 +20:09:31 8.1 0.46 156 PPM 099668 09:33:58.2 +20:39:30 9.2 0.09 156 5025_Mecisteus 09:33:49.2 +20:34:29 15.2 157 Positions are for equinox of date
Star training set for 5025_Mecisteus, (2025/02/28 04:53UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 12.26 168 4Lam Leo 09:31:43.2 +22:58:04 4.3 2.29 155 PPM 099647 09:31:34.8 +20:16:14 8.1 0.46 156 PPM 099668 09:32:33.2 +20:46:14 9.2 0.09 156 5025_Mecisteus 09:32:24.3 +20:41:13 15.2 156 Positions are for J2000