Occultation event with (2759) Idomeneus, event index number 3886
Regions able to see the event: Australia
Geocentric closest approach at 2026/07/24 11:18:07 UTC
J2000 position of star is 12:17:01.8 +06:17:09
Equinox of date position of star is 12:18:23.2 +06:08:18
Star is 65 degrees from the moon. Moon is 78% illuminated.
Stellar brightness G=14.8, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 6.9 per integration for unocculted signal
Expected flux drop is 66% with SNR of 4.6 for the occulted depth (per occulted point)
Apparent velocity is 27.5 km/sec on the sky relative to the star, or, 25.9 arcsec/hr.
Position angle of asteroid motion is 109.6 degrees
The recommended exposure time corresponds to 12.4 km per image.
The 1-sigma error in the time of the event is 0.4 seconds.
The 1-sigma cross-track error in the shadow position is 30.9 km.
The sky-plane scale is 3831.6 km/arcsec.
Diameter estimates:
58.9 km assuming a 5% albedo, maximum of 2.1 sec for a central chord
24.0 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 53.7 km used for deployment plan.
Star training set for 2759_Idomeneus, (2026/07/24 11:18UT) Object RA Dec mag sep mel Spica 13:26:35.8 -11:17:57 1.0 24.33 41 Denebola 11:50:24.8 +14:25:25 2.1 10.77 75 11 Vir 12:11:24.7 +05:39:34 5.7 1.80 66 PPM 158667 12:17:36.7 +06:04:33 8.5 0.20 65 PPM 158685 12:18:55.8 +06:14:13 10.0 0.17 65 PPM 158677 12:18:22.1 +06:14:31 10.4 0.10 65 2759_Idomeneus 12:18:23.2 +06:08:18 15.6 64 Positions are for equinox of date
Star training set for 2759_Idomeneus, (2026/07/24 11:18UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 24.33 41 Denebola 11:49:02.7 +14:34:16 2.1 10.77 75 11 Vir 12:10:03.2 +05:48:25 5.7 1.80 66 PPM 158667 12:16:15.3 +06:13:24 8.5 0.20 65 PPM 158685 12:17:34.5 +06:23:03 10.0 0.17 65 PPM 158677 12:17:00.7 +06:23:22 10.4 0.10 65 2759_Idomeneus 12:17:01.8 +06:17:09 15.6 65 Positions are for J2000