Occultation event with (6997) Laomedon, event index number 1714
Regions able to see the event: SMexico
Geocentric closest approach at 2025/12/23 08:20:59 UTC
J2000 position of star is 02:36:54.4 +03:22:32
Equinox of date position of star is 02:38:15.6 +03:29:14
Star is 89 degrees from the moon. Moon is 10% illuminated.
Stellar brightness G=15.6, apparent brightess of occulting body is G=16.2
Use an exposure time of 1.40 seconds with the standard RECON-QHY system.
SNR of 8.6 per integration for unocculted signal
Expected flux drop is 65% with SNR of 5.6 for the occulted depth (per occulted point)
Apparent velocity is 6.7 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
Position angle of asteroid motion is 81.5 degrees
The recommended exposure time corresponds to 9.3 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 32.4 km.
The sky-plane scale is 3628.4 km/arcsec.
Diameter estimates:
45.5 km assuming a 5% albedo, aximum of 6.8 sec for a central chord
18.6 km assuming a 30% albedo, maximum of 2.8 sec for a central chord
Cross-track diameter of 37.5 km used for deployment plan.
Star training set for 6997_Laomedon, (2025/12/23 08:21UT) Object RA Dec mag sep mel Aldebaran 04:37:24.9 +16:33:34 0.8 32.04 121 Menkar 03:03:38.4 +04:11:24 2.5 6.37 95 78Nu Cet 02:37:14.5 +05:42:19 4.9 2.23 89 PPM 145770 02:39:58.1 +03:33:15 7.1 0.43 89 PPM 145763 02:39:01.4 +03:35:38 10.0 0.22 89 6997_Laomedon 02:38:15.6 +03:29:14 16.2 89 Positions are for equinox of date
Star training set for 6997_Laomedon, (2025/12/23 08:21UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 32.04 121 Menkar 03:02:16.8 +04:05:21 2.5 6.37 95 78Nu Cet 02:35:52.4 +05:35:35 4.9 2.23 89 PPM 145770 02:38:36.8 +03:26:35 7.1 0.43 89 PPM 145763 02:37:40.1 +03:28:56 10.0 0.22 89 6997_Laomedon 02:36:54.4 +03:22:32 16.2 89 Positions are for J2000