Occultation event with (2759) Idomeneus, event index number 3441
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/03/15 23:06:54 UTC
J2000 position of star is 12:13:25.1 +03:31:29
Equinox of date position of star is 12:14:45.6 +03:22:45
Star is 135 degrees from the moon. Moon is 11% illuminated.
Stellar brightness G=16.5, apparent brightess of occulting body is G=14.4
Use an exposure time of 1.40 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 13% with SNR of 0.4 for the occulted depth (per occulted point)
Apparent velocity is 17.6 km/sec on the sky relative to the star, or, 22.6 arcsec/hr.
Position angle of asteroid motion is 131.5 degrees
The recommended exposure time corresponds to 24.6 km per image.
The 1-sigma error in the time of the event is 1.3 seconds.
The 1-sigma cross-track error in the shadow position is 24.3 km.
The sky-plane scale is 2804.8 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 3.4 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 53.7 km used for deployment plan.
Star training set for 2759_Idomeneus, (2026/03/15 23:07UT) Object RA Dec mag sep mel Spica 13:26:34.6 -11:17:50 1.0 23.12 113 Denebola 11:50:23.7 +14:25:32 2.1 12.57 144 10 Vir 12:11:01.9 +01:45:03 5.9 1.88 135 PPM 158610 12:13:50.2 +03:15:31 8.1 0.26 135 PPM 158621 12:14:45.8 +03:31:41 10.9 0.15 135 2759_Idomeneus 12:14:45.6 +03:22:45 14.4 135 Positions are for equinox of date
Star training set for 2759_Idomeneus, (2026/03/15 23:07UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 23.12 113 Denebola 11:49:02.7 +14:34:16 2.1 12.57 144 10 Vir 12:09:41.4 +01:53:48 5.9 1.88 135 PPM 158610 12:12:29.8 +03:24:15 8.1 0.26 135 PPM 158621 12:13:25.3 +03:40:25 10.9 0.15 135 2759_Idomeneus 12:13:25.1 +03:31:29 14.4 135 Positions are for J2000