Occultation event with (4867) Polites, event index number 4305
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/09/25 09:31:36 UTC
J2000 position of star is 05:48:03.4 +51:05:25
Equinox of date position of star is 05:50:09.9 +51:05:51
Star is 100 degrees from the moon. Moon is 98% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=15.6
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 28% with SNR of 0.8 for the occulted depth (per occulted point)
Apparent velocity is 15.1 km/sec on the sky relative to the star, or, 14.6 arcsec/hr.
Position angle of asteroid motion is 39.4 degrees
The recommended exposure time corresponds to 18.1 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 23.2 km.
The sky-plane scale is 3704.8 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, maximum of 4.2 sec for a central chord
25.5 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 57.3 km used for deployment plan.
Star training set for 4867_Polites, (2026/09/25 09:32UT) Object RA Dec mag sep mel Pollux 07:46:56.9 +27:57:34 1.1 31.89 126 34Bet Aur 06:01:29.4 +44:56:50 1.9 6.43 102 27Omi Aur 05:47:58.5 +49:50:05 5.5 1.31 99 PPM 030052 05:50:45.2 +51:10:19 7.7 0.12 100 PPM 030044 05:50:26.1 +51:01:32 8.6 0.08 100 PPM 030040 05:49:53.9 +51:06:25 10.3 0.04 100 4867_Polites 05:50:09.9 +51:05:51 15.6 100 Positions are for equinox of date
Star training set for 4867_Polites, (2026/09/25 09:32UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 31.89 126 34Bet Aur 05:59:31.6 +44:56:51 1.9 6.43 102 27Omi Aur 05:45:54.0 +49:49:35 5.5 1.31 99 PPM 030052 05:48:38.7 +51:09:55 7.7 0.12 100 PPM 030044 05:48:19.8 +51:01:07 8.6 0.08 100 PPM 030040 05:47:47.4 +51:05:59 10.3 0.04 100 4867_Polites 05:48:03.4 +51:05:25 15.6 100 Positions are for J2000