Occultation event with (5012) Eurymedon, event index number 1678
Regions able to see the event: Australia
Geocentric closest approach at 2025/12/13 20:29:57 UTC
J2000 position of star is 11:32:25.5 +07:28:21
Equinox of date position of star is 11:33:45.8 +07:19:45
Star is 25 degrees from the moon. Moon is 31% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=16.6
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 3.3 per integration for unocculted signal
Expected flux drop is 57% with SNR of 1.9 for the occulted depth (per occulted point)
Apparent velocity is 11.1 km/sec on the sky relative to the star, or, 10.0 arcsec/hr.
Position angle of asteroid motion is 106.1 degrees
The recommended exposure time corresponds to 8.9 km per image.
The 1-sigma error in the time of the event is 2.1 seconds.
The 1-sigma cross-track error in the shadow position is 25.5 km.
The sky-plane scale is 4018.1 km/arcsec.
Diameter estimates:
45.3 km assuming a 5% albedo, aximum of 4.1 sec for a central chord
18.5 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 37.0 km used for deployment plan.
Star training set for 5012_Eurymedon, (2025/12/13 20:30UT) Object RA Dec mag sep mel Regulus 10:09:45.1 +11:50:22 1.3 21.19 45 Denebola 11:50:22.9 +14:25:37 2.1 8.19 27 1Ome Vir 11:39:47.8 +07:59:26 6.5 1.63 24 PPM 157943 11:33:00.2 +07:43:12 8.0 0.43 25 PPM 157968 11:34:27.6 +07:16:03 9.2 0.18 24 5012_Eurymedon 11:33:45.8 +07:19:45 16.6 24 Positions are for equinox of date
Star training set for 5012_Eurymedon, (2025/12/13 20:30UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 21.19 45 Denebola 11:49:02.7 +14:34:16 2.1 8.19 27 1Ome Vir 11:38:27.6 +08:08:04 6.5 1.63 24 PPM 157943 11:31:39.8 +07:51:49 8.0 0.43 25 PPM 157968 11:33:07.3 +07:24:39 9.2 0.18 24 5012_Eurymedon 11:32:25.5 +07:28:21 16.6 25 Positions are for J2000