Occultation event with (4708) Polydoros, event index number 4736
Regions able to see the event: Europe,Senegal
Geocentric closest approach at 2026/11/17 19:48:03 UTC
J2000 position of star is 03:05:22.0 +24:20:20
Equinox of date position of star is 03:06:56.4 +24:26:31
Star is 82 degrees from the moon. Moon is 53% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=14.5
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 8.3 per integration for unocculted signal
Expected flux drop is 40% with SNR of 3.3 for the occulted depth (per occulted point)
Apparent velocity is 16.3 km/sec on the sky relative to the star, or, 20.5 arcsec/hr.
Position angle of asteroid motion is 69.1 degrees
The recommended exposure time corresponds to 13.1 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 30.0 km.
The sky-plane scale is 2875.6 km/arcsec.
Diameter estimates:
58.6 km assuming a 5% albedo, maximum of 3.6 sec for a central chord
23.9 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 55.0 km used for deployment plan.
Star training set for 4708_Polydoros, (2026/11/17 19:48UT) Object RA Dec mag sep mel Aldebaran 04:37:28.0 +16:33:40 0.8 22.58 101 44Zet Per 03:55:49.7 +31:57:40 2.8 13.12 94 52 Ari 03:07:01.7 +25:21:29 6.1 0.92 82 PPM 092225 03:09:26.5 +23:47:22 8.1 0.87 82 PPM 092211 03:07:55.5 +24:22:28 8.7 0.23 82 4708_Polydoros 03:06:56.4 +24:26:31 14.5 82 Positions are for equinox of date
Star training set for 4708_Polydoros, (2026/11/17 19:48UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 22.58 101 44Zet Per 03:54:07.9 +31:53:01 2.8 13.12 94 52 Ari 03:05:26.7 +25:15:19 6.1 0.92 82 PPM 092225 03:07:52.3 +23:41:16 8.1 0.87 82 PPM 092211 03:06:21.0 +24:16:19 8.7 0.23 82 4708_Polydoros 03:05:22.0 +24:20:20 14.5 82 Positions are for J2000