Occultation event with (12929) Periboea, event index number 720
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/02/26 22:05:03 UTC
J2000 position of star is 01:44:23.1 +00:04:47
Equinox of date position of star is 01:45:40.5 +00:12:20
Star is 61 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=13.6, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.18 seconds with the standard RECON-QHY system.
Expected flux drop is 11% with SNR of 9.8 per integration
Apparent velocity is 30.6 km/sec on the sky relative to the star, or, 26.3 arcsec/hr.
The recommended exposure time corresponds to 5.5 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 15.2 km.
The sky-plane scale is 4191.5 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, aximum of 1.9 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 58.9 km used for deployment plan.
Star training set for 12929_Periboea, (2025/02/26 22:05UT) Object RA Dec mag sep mel Fomalhaut 22:59:02.1 -29:29:18 1.2 49.57 21 68Omi Cet 02:20:37.2 -02:51:53 2.0 9.26 68 PPM 145130 01:57:11.9 +01:58:25 6.1 3.38 64 PPM 174960 01:42:39.4 -00:22:49 8.5 0.96 60 PPM 144941 01:45:53.9 +00:27:45 9.5 0.26 61 12929_Periboea 01:45:40.5 +00:12:20 15.8 61 Positions are for equinox of date
Star training set for 12929_Periboea, (2025/02/26 22:05UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.7 -29:37:24 1.2 49.57 21 68Omi Cet 02:19:20.8 -02:58:46 2.0 9.26 68 PPM 145130 01:55:54.0 +01:51:05 6.1 3.38 64 PPM 174960 01:41:22.2 -00:30:24 8.5 0.96 60 PPM 144941 01:44:36.4 +00:20:13 9.5 0.26 61 12929_Periboea 01:44:23.1 +00:04:47 15.8 61 Positions are for J2000