Occultation event with (4867) Polites, event index number 3947
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/08/06 08:56:56 UTC
J2000 position of star is 05:11:05.1 +47:36:52
Equinox of date position of star is 05:13:05.0 +47:38:43
Star is 38 degrees from the moon. Moon is 47% illuminated.
Stellar brightness G=14.6, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 8.7 per integration for unocculted signal
Expected flux drop is 75% with SNR of 6.5 for the occulted depth (per occulted point)
Apparent velocity is 31.4 km/sec on the sky relative to the star, or, 27.0 arcsec/hr.
Position angle of asteroid motion is 69.4 degrees
The recommended exposure time corresponds to 14.1 km per image.
The 1-sigma error in the time of the event is 0.3 seconds.
The 1-sigma cross-track error in the shadow position is 28.9 km.
The sky-plane scale is 4176.9 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, maximum of 2.0 sec for a central chord
25.5 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 57.3 km used for deployment plan.
Star training set for 4867_Polites, (2026/08/06 08:57UT) Object RA Dec mag sep mel Aldebaran 04:37:27.0 +16:33:38 0.8 31.94 25 34Bet Aur 06:01:28.8 +44:56:50 1.9 8.77 44 PPM 047798 05:12:42.1 +46:59:31 6.0 0.66 37 PPM 047807 05:13:17.9 +47:51:29 9.6 0.22 38 4867_Polites 05:13:05.0 +47:38:43 15.8 38 Positions are for equinox of date
Star training set for 4867_Polites, (2026/08/06 08:57UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 31.94 25 34Bet Aur 05:59:31.6 +44:56:51 1.9 8.77 44 PPM 047798 05:10:43.1 +46:57:40 6.0 0.66 37 PPM 047807 05:11:17.7 +47:49:39 9.6 0.22 38 4867_Polites 05:11:05.1 +47:36:52 15.8 38 Positions are for J2000