Occultation event with (2223) Sarpedon, event index number 4985
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/12/02 04:00:28 UTC
J2000 position of star is 05:27:29.4 +10:50:56
Equinox of date position of star is 05:28:59.0 +10:52:11
Star is 89 degrees from the moon. Moon is 40% illuminated.
Stellar brightness G=15.7, apparent brightess of occulting body is G=14.1
Use an exposure time of 1.10 seconds with the standard RECON-QHY system.
SNR of 5.0 per integration for unocculted signal
Expected flux drop is 19% with SNR of 0.9 for the occulted depth (per occulted point)
Apparent velocity is 17.5 km/sec on the sky relative to the star, or, 19.8 arcsec/hr.
Position angle of asteroid motion is 73.7 degrees
The recommended exposure time corresponds to 19.3 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 46.4 km.
The sky-plane scale is 3189.1 km/arcsec.
Diameter estimates:
90.4 km assuming a 5% albedo, maximum of 5.2 sec for a central chord
36.9 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 77.5 km used for deployment plan.
Star training set for 2223_Sarpedon, (2026/12/02 04:00UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.8 +07:24:35 0.4 7.65 82 Bellatrix 05:26:34.6 +06:22:18 1.6 4.54 90 PPM 121138 05:36:42.4 +10:15:20 5.7 1.99 87 PPM 120908 05:25:23.6 +11:06:24 8.2 0.91 90 PPM 120954 05:28:06.9 +11:17:57 9.4 0.48 89 PPM 120979 05:29:18.7 +10:53:35 10.4 0.08 89 2223_Sarpedon 05:28:59.0 +10:52:11 14.1 89 Positions are for equinox of date
Star training set for 2223_Sarpedon, (2026/12/02 04:00UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 7.65 82 Bellatrix 05:25:07.8 +06:20:58 1.6 4.54 90 PPM 121138 05:35:13.2 +10:14:24 5.7 1.99 87 PPM 120908 05:23:53.8 +11:05:01 8.2 0.91 90 PPM 120954 05:26:37.0 +11:16:40 9.4 0.48 89 PPM 120979 05:27:49.0 +10:52:21 10.4 0.08 89 2223_Sarpedon 05:27:29.4 +10:50:56 14.1 89 Positions are for J2000