Occultation event with (4867) Polites, event index number 1400
Regions able to see the event: Europe
Geocentric closest approach at 2025/10/22 22:49:33 UTC
J2000 position of star is 02:19:17.0 +46:59:41
Equinox of date position of star is 02:20:57.6 +47:06:45
Star is 153 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=15.6, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 5.1 per integration for unocculted signal
Expected flux drop is 37% with SNR of 1.9 for the occulted depth (per occulted point)
Apparent velocity is 16.9 km/sec on the sky relative to the star, or, 19.0 arcsec/hr.
Position angle of asteroid motion is 90.3 degrees
The recommended exposure time corresponds to 13.5 km per image.
The 1-sigma error in the time of the event is 0.8 seconds.
The 1-sigma cross-track error in the shadow position is 25.1 km.
The sky-plane scale is 3205.3 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, aximum 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, (2025/10/22 22:50UT) Object RA Dec mag sep mel Aldebaran 04:37:24.3 +16:33:33 0.8 41.50 154 57Gam1And 02:05:29.7 +42:27:08 2.3 5.41 157 62 And 02:20:57.6 +47:29:51 5.3 0.39 153 PPM 045001 02:22:22.7 +47:25:40 6.0 0.40 153 PPM 044983 02:20:42.8 +47:18:40 9.1 0.20 153 4867_Polites 02:20:57.6 +47:06:45 15.1 153 Positions are for equinox of date
Star training set for 4867_Polites, (2025/10/22 22:50UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 41.50 154 57Gam1And 02:03:54.1 +42:19:46 2.3 5.41 157 62 And 02:19:16.6 +47:22:48 5.3 0.39 153 PPM 045001 02:20:41.7 +47:18:38 6.0 0.40 153 PPM 044983 02:19:02.1 +47:11:36 9.1 0.20 153 4867_Polites 02:19:17.0 +46:59:41 15.1 153 Positions are for J2000