Occultation event with (12929) Periboea, event index number 4935
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/11/29 04:15:46 UTC
J2000 position of star is 05:51:31.9 -23:53:15
Equinox of date position of star is 05:52:38.8 -23:52:56
Star is 61 degrees from the moon. Moon is 73% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.75 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 33% with SNR of 1.0 for the occulted depth (per occulted point)
Apparent velocity is 19.4 km/sec on the sky relative to the star, or, 20.7 arcsec/hr.
Position angle of asteroid motion is 54.8 degrees
The recommended exposure time corresponds to 14.6 km per image.
The 1-sigma error in the time of the event is 0.5 seconds.
The 1-sigma cross-track error in the shadow position is 25.2 km.
The sky-plane scale is 3382.0 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 3.0 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 54.1 km used for deployment plan.
Star training set for 12929_Periboea, (2026/11/29 04:16UT) Object RA Dec mag sep mel Sirius 06:46:20.0 -16:45:16 -1.5 14.45 47 Nihal 05:29:24.0 -20:44:23 2.8 6.23 64 PPM 249499 05:52:36.1 -22:55:20 6.1 0.96 61 PPM 249465 05:51:20.3 -24:06:18 8.0 0.37 62 PPM 249497 05:52:29.7 -24:01:20 8.7 0.14 61 12929_Periboea 05:52:38.8 -23:52:56 15.4 61 Positions are for equinox of date
Star training set for 12929_Periboea, (2026/11/29 04:16UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:29 -1.5 14.45 47 Nihal 05:28:14.7 -20:45:36 2.8 6.23 64 PPM 249499 05:51:28.6 -22:55:38 6.1 0.96 61 PPM 249465 05:50:13.6 -24:06:40 8.0 0.37 62 PPM 249497 05:51:23.0 -24:01:39 8.7 0.14 61 12929_Periboea 05:51:31.9 -23:53:15 15.4 61 Positions are for J2000