Occultation event with (2223) Sarpedon, event index number 4293
Regions able to see the event: Europe
Geocentric closest approach at 2026/09/24 03:07:08 UTC
J2000 position of star is 05:39:52.5 +14:05:21
Equinox of date position of star is 05:41:23.6 +14:06:06
Star is 115 degrees from the moon. Moon is 93% illuminated.
Stellar brightness G=15.3, apparent brightess of occulting body is G=14.8
Use an exposure time of 1.55 seconds with the standard RECON-QHY system.
SNR of 10.0 per integration for unocculted signal
Expected flux drop is 39% with SNR of 3.9 for the occulted depth (per occulted point)
Apparent velocity is 11.5 km/sec on the sky relative to the star, or, 11.1 arcsec/hr.
Position angle of asteroid motion is 127.4 degrees
The recommended exposure time corresponds to 17.8 km per image.
The 1-sigma error in the time of the event is 2.9 seconds.
The 1-sigma cross-track error in the shadow position is 31.6 km.
The sky-plane scale is 3736.3 km/arcsec.
Diameter estimates:
90.4 km assuming a 5% albedo, maximum of 7.9 sec for a central chord
36.9 km assuming a 30% albedo, maximum of 3.2 sec for a central chord
Cross-track diameter of 77.5 km used for deployment plan.
Star training set for 2223_Sarpedon, (2026/09/24 03:07UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.2 +07:24:35 0.4 7.66 118 Bellatrix 05:26:34.0 +06:22:18 1.6 8.55 110 35 Ori 05:35:25.5 +14:19:19 5.6 1.46 113 PPM 121221 05:40:39.0 +14:34:11 7.5 0.50 115 PPM 121275 05:43:10.9 +13:55:54 9.3 0.47 115 PPM 121214 05:40:18.4 +13:51:44 10.2 0.36 115 2223_Sarpedon 05:41:23.6 +14:06:06 14.8 115 Positions are for equinox of date
Star training set for 2223_Sarpedon, (2026/09/24 03:07UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 7.66 118 Bellatrix 05:25:07.8 +06:20:58 1.6 8.55 110 35 Ori 05:33:54.3 +14:18:20 5.6 1.46 113 PPM 121221 05:39:07.6 +14:33:24 7.5 0.50 115 PPM 121275 05:41:39.9 +13:55:13 9.3 0.47 115 PPM 121214 05:38:47.4 +13:50:56 10.2 0.36 115 2223_Sarpedon 05:39:52.5 +14:05:21 14.8 115 Positions are for J2000