Occultation event with (6997) Laomedon, event index number 4083
Regions able to see the event: SAmericaS
Geocentric closest approach at 2026/08/23 09:00:24 UTC
J2000 position of star is 04:53:49.9 +08:28:05
Equinox of date position of star is 04:55:16.9 +08:30:36
Star is 151 degrees from the moon. Moon is 79% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=16.7
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 4.2 per integration for unocculted signal
Expected flux drop is 75% with SNR of 3.1 for the occulted depth (per occulted point)
Apparent velocity is 20.0 km/sec on the sky relative to the star, or, 17.0 arcsec/hr.
Position angle of asteroid motion is 110.3 degrees
The recommended exposure time corresponds to 9.0 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 30.8 km.
The sky-plane scale is 4228.2 km/arcsec.
Diameter estimates:
45.5 km assuming a 5% albedo, maximum of 2.3 sec for a central chord
18.6 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 37.5 km used for deployment plan.
Star training set for 6997_Laomedon, (2026/08/23 09:00UT) Object RA Dec mag sep mel Aldebaran 04:37:27.2 +16:33:38 0.8 9.15 152 Bellatrix 05:26:33.7 +06:22:18 1.6 8.04 154 2Pi 2Ori 04:52:04.0 +08:56:37 4.4 0.91 151 PPM 148163 04:56:23.4 +08:38:28 7.1 0.30 151 PPM 148107 04:54:09.0 +08:24:26 9.4 0.30 151 6997_Laomedon 04:55:16.9 +08:30:36 16.7 151 Positions are for equinox of date
Star training set for 6997_Laomedon, (2026/08/23 09:00UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 9.15 152 Bellatrix 05:25:07.8 +06:20:58 1.6 8.04 154 2Pi 2Ori 04:50:36.7 +08:54:00 4.4 0.91 151 PPM 148163 04:54:56.3 +08:36:00 7.1 0.30 151 PPM 148107 04:52:42.0 +08:21:53 9.4 0.30 151 6997_Laomedon 04:53:49.9 +08:28:05 16.7 151 Positions are for J2000