Occultation event with (4867) Polites, event index number 3235
Regions able to see the event: Senegal
Geocentric closest approach at 2026/02/10 19:43:10 UTC
J2000 position of star is 02:01:22.9 +40:47:24
Equinox of date position of star is 02:02:58.5 +40:54:55
Star is 149 degrees from the moon. Moon is 38% illuminated.
Stellar brightness G=12.0, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 21.1 per integration for unocculted signal
Expected flux drop is 97% with SNR of 20.4 for the occulted depth (per occulted point)
Apparent velocity is 20.1 km/sec on the sky relative to the star, or, 18.8 arcsec/hr.
Position angle of asteroid motion is 101.2 degrees
The recommended exposure time corresponds to 2.4 km per image.
The 1-sigma error in the time of the event is 0.5 seconds.
The 1-sigma cross-track error in the shadow position is 26.3 km.
The sky-plane scale is 3845.7 km/arcsec.
Diameter estimates:
62.5 km assuming a 5% albedo, maximum of 3.1 sec for a central chord
25.5 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 57.3 km used for deployment plan.
Star training set for 4867_Polites, (2026/02/10 19:43UT) Object RA Dec mag sep mel Aldebaran 04:37:25.3 +16:33:35 0.8 41.18 169 57Gam1And 02:05:30.9 +42:27:13 2.3 1.61 149 59 And 02:12:28.6 +39:09:41 6.0 2.53 152 PPM 044677 02:02:49.4 +41:20:16 7.8 0.42 149 PPM 044688 02:03:24.8 +40:47:33 8.7 0.15 150 4867_Polites 02:02:58.5 +40:54:55 15.6 150 Positions are for equinox of date
Star training set for 4867_Polites, (2026/02/10 19:43UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 41.18 169 57Gam1And 02:03:54.1 +42:19:46 2.3 1.61 149 59 And 02:10:52.9 +39:02:22 6.0 2.53 152 PPM 044677 02:01:13.6 +41:12:45 7.8 0.42 149 PPM 044688 02:01:49.2 +40:40:03 8.7 0.15 150 4867_Polites 02:01:22.9 +40:47:24 15.6 149 Positions are for J2000