Occultation event with (6997) Laomedon, event index number 1392
Regions able to see the event: SAfrica
Geocentric closest approach at 2025/10/19 23:48:25 UTC
J2000 position of star is 03:02:26.0 +06:12:56
Equinox of date position of star is 03:03:48.0 +06:18:57
Star is 143 degrees from the moon. Moon is 2% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 39% with SNR of 1.2 for the occulted depth (per occulted point)
Apparent velocity is 17.8 km/sec on the sky relative to the star, or, 18.9 arcsec/hr.
Position angle of asteroid motion is 57.1 degrees
The recommended exposure time corresponds to 15.1 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 27.6 km.
The sky-plane scale is 3386.9 km/arcsec.
Diameter estimates:
45.5 km assuming a 5% albedo, aximum of 2.6 sec for a central chord
18.6 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 37.5 km used for deployment plan.
Star training set for 6997_Laomedon, (2025/10/19 23:48UT) Object RA Dec mag sep mel Aldebaran 04:37:24.3 +16:33:32 0.8 25.08 120 Menkar 03:03:37.9 +04:11:22 2.5 2.13 143 PPM 146189 03:04:50.2 +06:19:33 6.3 0.26 143 6997_Laomedon 03:03:48.0 +06:18:57 15.9 143 Positions are for equinox of date
Star training set for 6997_Laomedon, (2025/10/19 23:48UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 25.08 120 Menkar 03:02:16.8 +04:05:21 2.5 2.13 143 PPM 146189 03:03:28.2 +06:13:34 6.3 0.26 143 6997_Laomedon 03:02:26.0 +06:12:56 15.9 143 Positions are for J2000