Occultation event with (4708) Polydoros, event index number 4550
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/11/03 02:04:40 UTC
J2000 position of star is 03:13:41.4 +24:59:14
Equinox of date position of star is 03:15:16.5 +25:05:09
Star is 94 degrees from the moon. Moon is 37% illuminated.
Stellar brightness G=9.8, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 62.1 per integration for unocculted signal
Expected flux drop is 99% with SNR of 61.4 for the occulted depth (per occulted point)
Apparent velocity is 15.7 km/sec on the sky relative to the star, or, 19.6 arcsec/hr.
Position angle of asteroid motion is 73.0 degrees
The recommended exposure time corresponds to 1.9 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 31.3 km.
The sky-plane scale is 2883.0 km/arcsec.
Diameter estimates:
58.6 km assuming a 5% albedo, maximum of 3.7 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, (2026/11/03 02:05UT) Object RA Dec mag sep mel Aldebaran 04:37:27.8 +16:33:40 0.8 20.98 77 44Zet Per 03:55:49.6 +31:57:40 2.8 11.24 83 52 Ari 03:07:01.5 +25:21:29 6.1 1.89 95 PPM 092328 03:17:14.9 +24:38:29 8.0 0.63 93 PPM 092318 03:16:24.9 +25:01:36 9.0 0.26 93 PPM 092308 03:15:16.5 +25:05:09 10.7 0.00 94 4708_Polydoros 03:15:16.5 +25:05:09 14.6 93 Positions are for equinox of date
Star training set for 4708_Polydoros, (2026/11/03 02:05UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 20.98 77 44Zet Per 03:54:07.9 +31:53:01 2.8 11.24 83 52 Ari 03:05:26.7 +25:15:19 6.1 1.89 95 PPM 092328 03:15:40.0 +24:32:37 8.0 0.63 93 PPM 092318 03:14:49.7 +24:55:42 9.0 0.26 93 PPM 092308 03:13:41.4 +24:59:14 10.7 0.00 94 4708_Polydoros 03:13:41.4 +24:59:14 14.6 94 Positions are for J2000