Occultation event with (4867) Polites, event index number 1337
Regions able to see the event: US
Geocentric closest approach at 2025/10/05 12:21:43 UTC
J2000 position of star is 02:31:05.0 +46:36:26
Equinox of date position of star is 02:32:46.7 +46:43:12
Star is 65 degrees from the moon. Moon is 96% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=15.2
Use an exposure time of 1.30 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 21% with SNR of 0.6 for the occulted depth (per occulted point)
Apparent velocity is 15.0 km/sec on the sky relative to the star, or, 16.4 arcsec/hr.
Position angle of asteroid motion is 113.0 degrees
The recommended exposure time corresponds to 19.5 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 28.7 km.
The sky-plane scale is 3284.2 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, aximum 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, (2025/10/05 12:22UT) Object RA Dec mag sep mel Aldebaran 04:37:24.1 +16:33:32 0.8 39.66 80 57Gam1And 02:05:29.5 +42:27:07 2.3 6.46 59 PPM 045001 02:22:22.5 +47:25:39 6.0 1.91 64 PPM 045170 02:33:36.1 +46:41:53 7.2 0.14 65 4867_Polites 02:32:46.7 +46:43:12 15.2 65 Positions are for equinox of date
Star training set for 4867_Polites, (2025/10/05 12:22UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 39.66 80 57Gam1And 02:03:54.1 +42:19:46 2.3 6.46 59 PPM 045001 02:20:41.7 +47:18:38 6.0 1.91 64 PPM 045170 02:31:54.4 +46:35:07 7.2 0.14 65 4867_Polites 02:31:05.0 +46:36:26 15.2 65 Positions are for J2000