Occultation event with (4867) Polites, event index number 1544
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/11/19 01:09:57 UTC
J2000 position of star is 01:59:35.3 +46:08:31
Equinox of date position of star is 02:01:13.0 +46:15:59
Star is 153 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=15.0
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 4.5 per integration for unocculted signal
Expected flux drop is 33% with SNR of 1.5 for the occulted depth (per occulted point)
Apparent velocity is 16.8 km/sec on the sky relative to the star, or, 18.9 arcsec/hr.
Position angle of asteroid motion is 61.7 degrees
The recommended exposure time corresponds to 14.3 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 13.4 km.
The sky-plane scale is 3193.7 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, maximum 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, (2025/11/19 01:10UT) Object RA Dec mag sep mel Aldebaran 04:37:24.5 +16:33:33 0.8 43.90 152 57Gam1And 02:05:30.0 +42:27:09 2.3 3.89 156 PPM 044428 01:49:24.1 +46:21:27 6.3 2.04 152 PPM 044585 01:58:05.6 +46:05:41 8.0 0.57 153 PPM 044652 02:01:06.6 +46:16:31 10.0 0.02 153 4867_Polites 02:01:13.0 +46:15:59 15.0 153 Positions are for equinox of date
Star training set for 4867_Polites, (2025/11/19 01:10UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 43.90 152 57Gam1And 02:03:54.1 +42:19:46 2.3 3.89 156 PPM 044428 01:47:48.0 +46:13:46 6.3 2.04 152 PPM 044585 01:56:28.5 +45:58:09 8.0 0.57 153 PPM 044652 01:59:28.9 +46:09:02 10.0 0.02 153 4867_Polites 01:59:35.3 +46:08:31 15.0 153 Positions are for J2000