Occultation event with (4867) Polites, event index number 4022
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/08/16 09:48:37 UTC
J2000 position of star is 05:20:43.6 +48:15:38
Equinox of date position of star is 05:22:44.8 +48:17:07
Star is 108 degrees from the moon. Moon is 16% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
SNR of 3.3 per integration for unocculted signal
Expected flux drop is 48% with SNR of 1.6 for the occulted depth (per occulted point)
Apparent velocity is 28.3 km/sec on the sky relative to the star, or, 24.9 arcsec/hr.
Position angle of asteroid motion is 66.8 degrees
The recommended exposure time corresponds to 14.2 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 28.8 km.
The sky-plane scale is 4091.9 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, maximum of 2.2 sec for a central chord
25.5 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 57.3 km used for deployment plan.
Star training set for 4867_Polites, (2026/08/16 09:49UT) Object RA Dec mag sep mel Aldebaran 04:37:27.1 +16:33:38 0.8 33.05 120 34Bet Aur 06:01:29.0 +44:56:50 1.9 7.43 101 PPM 047798 05:12:42.2 +46:59:31 6.0 2.13 110 PPM 047962 05:20:34.8 +48:56:57 7.8 0.75 108 PPM 047997 05:22:04.7 +48:00:15 9.2 0.30 108 4867_Polites 05:22:44.8 +48:17:07 15.7 107 Positions are for equinox of date
Star training set for 4867_Polites, (2026/08/16 09:49UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 33.05 120 34Bet Aur 05:59:31.6 +44:56:51 1.9 7.43 101 PPM 047798 05:10:43.1 +46:57:40 6.0 2.13 110 PPM 047962 05:18:32.7 +48:55:23 7.8 0.75 108 PPM 047997 05:20:03.9 +47:58:45 9.2 0.30 108 4867_Polites 05:20:43.6 +48:15:38 15.7 108 Positions are for J2000