Occultation event with (12929) Periboea, event index number 4418
Regions able to see the event: UAE
Geocentric closest approach at 2026/10/17 00:45:39 UTC
J2000 position of star is 06:02:58.2 -18:45:55
Equinox of date position of star is 06:04:08.4 -18:46:03
Star is 134 degrees from the moon. Moon is 35% illuminated.
Stellar brightness G=12.8, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 12.6 per integration for unocculted signal
Expected flux drop is 93% with SNR of 11.7 for the occulted depth (per occulted point)
Apparent velocity is 21.3 km/sec on the sky relative to the star, or, 21.2 arcsec/hr.
Position angle of asteroid motion is 179.4 degrees
The recommended exposure time corresponds to 2.6 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 6.1 km.
The sky-plane scale is 3600.8 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 2.8 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 54.1 km used for deployment plan.
Star training set for 12929_Periboea, (2026/10/17 00:46UT) Object RA Dec mag sep mel Sirius 06:46:19.7 -16:45:15 -1.5 10.24 136 2Bet CMa 06:23:52.8 -17:58:16 2.0 4.75 135 19 Lep 06:08:51.6 -19:10:15 4.8 1.19 133 PPM 216622 06:03:33.7 -18:34:12 7.8 0.24 134 PPM 216651 06:04:43.2 -18:39:50 9.9 0.17 134 12929_Periboea 06:04:08.4 -18:46:03 15.6 134 Positions are for equinox of date
Star training set for 12929_Periboea, (2026/10/17 00:46UT) Object RA Dec mag sep mel Sirius 06:45:07.9 -16:43:29 -1.5 10.24 136 2Bet CMa 06:22:42.0 -17:57:21 2.0 4.75 135 19 Lep 06:07:41.6 -19:09:55 4.8 1.19 133 PPM 216622 06:02:23.3 -18:34:05 7.8 0.24 134 PPM 216651 06:03:32.9 -18:39:40 9.9 0.17 134 12929_Periboea 06:02:58.2 -18:45:55 15.6 134 Positions are for J2000