Occultation event with (4867) Polites, event index number 1493
Regions able to see the event: Europe
Geocentric closest approach at 2025/11/11 19:11:10 UTC
J2000 position of star is 02:04:30.2 +46:31:37
Equinox of date position of star is 02:06:08.7 +46:39:00
Star is 87 degrees from the moon. Moon is 55% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=15.0
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 3.5 per integration for unocculted signal
Expected flux drop is 27% with SNR of 1.0 for the occulted depth (per occulted point)
Apparent velocity is 17.3 km/sec on the sky relative to the star, or, 19.6 arcsec/hr.
Position angle of asteroid motion is 69.3 degrees
The recommended exposure time corresponds to 13.8 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 17.1 km.
The sky-plane scale is 3182.9 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, aximum of 3.6 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, (2025/11/11 19:11UT) Object RA Dec mag sep mel Aldebaran 04:37:24.5 +16:33:33 0.8 43.36 65 57Gam1And 02:05:29.9 +42:27:09 2.3 4.20 89 PPM 044899 02:15:42.7 +47:36:13 6.3 1.89 85 PPM 044756 02:07:49.4 +46:58:55 7.5 0.44 87 PPM 044735 02:06:38.5 +46:41:51 8.7 0.10 87 4867_Polites 02:06:08.7 +46:39:00 15.0 87 Positions are for equinox of date
Star training set for 4867_Polites, (2025/11/11 19:11UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 43.36 65 57Gam1And 02:03:54.1 +42:19:46 2.3 4.20 89 PPM 044899 02:14:02.2 +47:29:02 6.3 1.89 85 PPM 044756 02:06:10.5 +46:51:34 7.5 0.44 87 PPM 044735 02:04:59.9 +46:34:29 8.7 0.10 87 4867_Polites 02:04:30.2 +46:31:37 15.0 87 Positions are for J2000