Occultation event with (4867) Polites, event index number 1648
Regions able to see the event: Europe
Geocentric closest approach at 2025/12/06 17:46:10 UTC
J2000 position of star is 01:50:20.2 +44:52:52
Equinox of date position of star is 01:51:56.0 +45:00:32
Star is 60 degrees from the moon. Moon is 95% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.1
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
SNR of 3.6 per integration for unocculted signal
Expected flux drop is 27% with SNR of 1.0 for the occulted depth (per occulted point)
Apparent velocity is 14.3 km/sec on the sky relative to the star, or, 15.7 arcsec/hr.
Position angle of asteroid motion is 40.9 degrees
The recommended exposure time corresponds to 14.3 km per image.
The 1-sigma error in the time of the event is 2.0 seconds.
The 1-sigma cross-track error in the shadow position is 2.7 km.
The sky-plane scale is 3261.3 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, aximum of 4.4 sec for a central chord
25.5 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 57.3 km used for deployment plan.
Star training set for 4867_Polites, (2025/12/06 17:46UT) Object RA Dec mag sep mel Aldebaran 04:37:24.7 +16:33:33 0.8 44.75 32 57Gam1And 02:05:30.2 +42:27:10 2.3 3.54 58 PPM 044428 01:49:24.3 +46:21:28 6.3 1.42 60 PPM 044460 01:50:42.0 +45:10:42 8.4 0.28 60 PPM 044501 01:53:12.8 +45:08:01 8.9 0.26 59 4867_Polites 01:51:56.0 +45:00:32 15.1 59 Positions are for equinox of date
Star training set for 4867_Polites, (2025/12/06 17:46UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 44.75 32 57Gam1And 02:03:54.1 +42:19:46 2.3 3.54 58 PPM 044428 01:47:48.0 +46:13:46 6.3 1.42 60 PPM 044460 01:49:06.2 +45:03:00 8.4 0.28 60 PPM 044501 01:51:36.7 +45:00:23 8.9 0.26 59 4867_Polites 01:50:20.2 +44:52:52 15.1 60 Positions are for J2000