Occultation event with (12714) Alkimos, event index number 770
Regions able to see the event: SAmericaN,SAfrica
Geocentric closest approach at 2025/03/07 00:04:28 UTC
J2000 position of star is 09:56:03.7 +05:40:13
Equinox of date position of star is 09:57:22.8 +05:32:59
Star is 69 degrees from the moon. Moon is 54% illuminated.
Stellar brightness G=12.0, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
Expected flux drop is 6% with SNR of 20.7 per integration
Apparent velocity is 15.6 km/sec on the sky relative to the star, or, 18.6 arcsec/hr.
The recommended exposure time corresponds to 1.9 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 23.8 km.
The sky-plane scale is 3019.8 km/arcsec.
Diameter estimates:
53.0 km assuming a 5% albedo, aximum of 3.4 sec for a central chord
21.6 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 53.0 km used for deployment plan.
Star training set for 12714_Alkimos, (2025/03/07 00:04UT) Object RA Dec mag sep mel Regulus 10:09:42.6 +11:50:35 1.3 6.99 69 4 Sex 09:51:48.6 +04:13:29 6.2 1.92 69 PPM 156301 09:55:02.2 +05:50:19 7.2 0.65 69 PPM 156370 09:59:07.5 +05:31:02 9.7 0.44 70 PPM 156333 09:57:12.4 +05:47:08 11.2 0.24 69 12714_Alkimos 09:57:22.8 +05:32:59 15.1 70 Positions are for equinox of date
Star training set for 12714_Alkimos, (2025/03/07 00:04UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 6.99 69 4 Sex 09:50:29.8 +04:20:36 6.2 1.92 69 PPM 156301 09:53:42.9 +05:57:30 7.2 0.65 69 PPM 156370 09:57:48.4 +05:38:17 9.7 0.44 70 PPM 156333 09:55:53.2 +05:54:21 11.2 0.24 69 12714_Alkimos 09:56:03.7 +05:40:13 15.1 69 Positions are for J2000