Occultation event with (12929) Periboea, event index number 3370
Regions able to see the event: Australia
Geocentric closest approach at 2026/03/07 10:13:53 UTC
J2000 position of star is 03:31:51.6 -10:16:08
Equinox of date position of star is 03:33:07.0 -10:10:53
Star is 144 degrees from the moon. Moon is 85% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 6.3 per integration for unocculted signal
Expected flux drop is 67% with SNR of 4.2 for the occulted depth (per occulted point)
Apparent velocity is 24.7 km/sec on the sky relative to the star, or, 21.8 arcsec/hr.
Position angle of asteroid motion is 63.3 degrees
The recommended exposure time corresponds to 12.3 km per image.
The 1-sigma error in the time of the event is 0.1 seconds.
The 1-sigma cross-track error in the shadow position is 25.8 km.
The sky-plane scale is 4068.5 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 2.4 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 54.1 km used for deployment plan.
Star training set for 12929_Periboea, (2026/03/07 10:14UT) Object RA Dec mag sep mel Rigel 05:15:47.8 -08:10:24 0.1 25.41 125 Menkar 03:03:39.1 +04:11:27 2.5 16.14 160 18Eps Eri 03:34:10.0 -09:22:16 3.7 0.85 145 PPM 185857 03:31:56.4 -09:38:31 7.2 0.61 145 PPM 213043 03:32:53.3 -10:08:37 9.8 0.07 145 12929_Periboea 03:33:07.0 -10:10:53 15.9 144 Positions are for equinox of date
Star training set for 12929_Periboea, (2026/03/07 10:14UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 25.41 125 Menkar 03:02:16.8 +04:05:21 2.5 16.14 160 18Eps Eri 03:32:54.2 -09:27:29 3.7 0.85 145 PPM 185857 03:30:40.7 -09:43:48 7.2 0.61 145 PPM 213043 03:31:37.8 -10:13:52 9.8 0.07 145 12929_Periboea 03:31:51.6 -10:16:08 15.9 144 Positions are for J2000