Occultation event with (4867) Polites, event index number 4271
Regions able to see the event: Europe
Geocentric closest approach at 2026/09/20 00:58:26 UTC
J2000 position of star is 05:45:42.4 +50:41:18
Equinox of date position of star is 05:47:48.1 +50:41:49
Star is 154 degrees from the moon. Moon is 61% illuminated.
Stellar brightness G=15.2, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 7.9 per integration for unocculted signal
Expected flux drop is 59% with SNR of 4.6 for the occulted depth (per occulted point)
Apparent velocity is 16.7 km/sec on the sky relative to the star, or, 16.0 arcsec/hr.
Position angle of asteroid motion is 45.8 degrees
The recommended exposure time corresponds to 14.2 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 24.2 km.
The sky-plane scale is 3758.4 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, maximum of 3.7 sec for a central chord
25.5 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 57.3 km used for deployment plan.
Star training set for 4867_Polites, (2026/09/20 00:58UT) Object RA Dec mag sep mel Pollux 07:46:56.9 +27:57:34 1.1 31.97 166 34Bet Aur 06:01:29.4 +44:56:50 1.9 6.19 160 27Omi Aur 05:47:58.4 +49:50:05 5.5 0.86 155 PPM 029992 05:45:28.9 +50:42:43 8.1 0.37 154 PPM 030018 05:47:54.8 +50:39:26 8.8 0.04 154 4867_Polites 05:47:48.1 +50:41:49 15.6 154 Positions are for equinox of date
Star training set for 4867_Polites, (2026/09/20 00:58UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 31.97 166 34Bet Aur 05:59:31.6 +44:56:51 1.9 6.19 160 27Omi Aur 05:45:54.0 +49:49:35 5.5 0.86 155 PPM 029992 05:43:23.2 +50:42:07 8.1 0.37 154 PPM 030018 05:45:49.2 +50:38:55 8.8 0.04 154 4867_Polites 05:45:42.4 +50:41:18 15.6 154 Positions are for J2000