Occultation event with (4867) Polites, event index number 1287
Regions able to see the event: Europe
Geocentric closest approach at 2025/09/15 21:08:32 UTC
J2000 position of star is 02:39:49.4 +45:22:50
Equinox of date position of star is 02:41:30.9 +45:29:24
Star is 52 degrees from the moon. Moon is 34% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=15.3
Use an exposure time of 1.05 seconds with the standard RECON-QHY system.
SNR of 4.5 per integration for unocculted signal
Expected flux drop is 35% with SNR of 1.6 for the occulted depth (per occulted point)
Apparent velocity is 13.5 km/sec on the sky relative to the star, or, 14.2 arcsec/hr.
Position angle of asteroid motion is 147.6 degrees
The recommended exposure time corresponds to 14.2 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 24.4 km.
The sky-plane scale is 3426.0 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, aximum of 4.6 sec for a central chord
25.5 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 57.3 km used for deployment plan.
Star training set for 4867_Polites, (2025/09/15 21:09UT) Object RA Dec mag sep mel Aldebaran 04:37:23.9 +16:33:32 0.8 37.71 34 Algol 03:09:51.1 +41:03:10 2.1 6.80 47 PPM 044985 02:20:50.6 +46:35:22 6.2 3.75 56 PPM 045356 02:43:28.4 +45:36:09 8.3 0.36 52 PPM 045325 02:42:13.5 +45:41:57 9.4 0.24 52 4867_Polites 02:41:30.9 +45:29:24 15.3 52 Positions are for equinox of date
Star training set for 4867_Polites, (2025/09/15 21:09UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 37.71 34 Algol 03:08:10.1 +40:57:20 2.1 6.80 47 PPM 044985 02:19:10.8 +46:28:20 6.2 3.75 56 PPM 045356 02:41:46.5 +45:29:38 8.3 0.36 52 PPM 045325 02:40:31.7 +45:35:24 9.4 0.24 52 4867_Polites 02:39:49.4 +45:22:50 15.3 52 Positions are for J2000