Occultation event with (12714) Alkimos, event index number 3420
Regions able to see the event: UAE
Geocentric closest approach at 2026/03/13 17:46:49 UTC
J2000 position of star is 12:07:24.1 -12:21:38
Equinox of date position of star is 12:08:45.0 -12:30:23
Star is 101 degrees from the moon. Moon is 28% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=15.1
Use an exposure time of 1.25 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 21% with SNR of 0.6 for the occulted depth (per occulted point)
Apparent velocity is 16.1 km/sec on the sky relative to the star, or, 18.8 arcsec/hr.
Position angle of asteroid motion is 106.0 degrees
The recommended exposure time corresponds to 20.1 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 28.9 km.
The sky-plane scale is 3084.6 km/arcsec.
Diameter estimates:
53.5 km assuming a 5% albedo, maximum of 3.3 sec for a central chord
21.8 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 47.8 km used for deployment plan.
Star training set for 12714_Alkimos, (2026/03/13 17:47UT) Object RA Dec mag sep mel Spica 13:26:34.6 -11:17:50 1.0 19.07 85 4Gam Crv 12:17:09.4 -17:41:14 2.6 5.56 97 PPM 225208 12:00:29.9 -10:37:18 6.4 2.76 104 PPM 225366 12:08:07.9 -12:23:12 6.8 0.19 101 PPM 225376 12:08:42.8 -12:34:21 9.5 0.07 101 12714_Alkimos 12:08:45.0 -12:30:23 15.1 101 Positions are for equinox of date
Star training set for 12714_Alkimos, (2026/03/13 17:47UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 19.07 85 4Gam Crv 12:15:48.1 -17:32:30 2.6 5.56 97 PPM 225208 11:59:09.3 -10:28:33 6.4 2.76 104 PPM 225366 12:06:47.1 -12:14:27 6.8 0.19 101 PPM 225376 12:07:22.0 -12:25:36 9.5 0.07 101 12714_Alkimos 12:07:24.1 -12:21:38 15.1 101 Positions are for J2000