Occultation event with (12929) Periboea, event index number 1160
Regions able to see the event: Australia
Geocentric closest approach at 2025/07/22 19:44:50 UTC
J2000 position of star is 03:40:22.6 +00:48:37
Equinox of date position of star is 03:41:41.6 +00:53:29
Star is 47 degrees from the moon. Moon is 5% illuminated.
Stellar brightness G=15.4, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 4.8 per integration for unocculted signal
Expected flux drop is 59% with SNR of 2.9 for the occulted depth (per occulted point)
Apparent velocity is 27.1 km/sec on the sky relative to the star, or, 24.5 arcsec/hr.
The recommended exposure time corresponds to 13.6 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 19.0 km.
The sky-plane scale is 3979.7 km/arcsec.
Diameter estimates:
58.6 km assuming a 5% albedo, aximum of 2.2 sec for a central chord
23.9 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 58.6 km used for deployment plan.
Star training set for 12929_Periboea, (2025/07/22 19:45UT) Object RA Dec mag sep mel Aldebaran 04:37:23.4 +16:33:31 0.8 20.82 27 Menkar 03:03:37.1 +04:11:18 2.5 10.06 53 10 Tau 03:38:10.8 +00:28:52 4.3 0.97 48 PPM 146746 03:39:09.1 +00:13:24 7.6 0.92 48 PPM 146766 03:40:17.8 +00:52:41 9.1 0.35 47 12929_Periboea 03:41:41.6 +00:53:29 15.8 47 Positions are for equinox of date
Star training set for 12929_Periboea, (2025/07/22 19:45UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 20.82 27 Menkar 03:02:16.8 +04:05:21 2.5 10.06 53 10 Tau 03:36:52.0 +00:23:54 4.3 0.97 48 PPM 146746 03:37:50.4 +00:08:27 7.6 0.92 48 PPM 146766 03:38:58.8 +00:47:46 9.1 0.35 47 12929_Periboea 03:40:22.6 +00:48:37 15.8 47 Positions are for J2000