Occultation event with (2759) Idomeneus, event index number 864
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/03/28 23:55:32 UTC
J2000 position of star is 09:18:41.4 +05:06:22
Equinox of date position of star is 09:20:01.0 +04:59:55
Star is 138 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=16.8, apparent brightess of occulting body is G=15.0
Use an exposure time of 1.65 seconds with the standard RECON-QHY system.
Expected flux drop is 83% with SNR of 3.0 per integration
Apparent velocity is 11.2 km/sec on the sky relative to the star, or, 13.3 arcsec/hr.
The recommended exposure time corresponds to 18.5 km per image.
The 1-sigma error in the time of the event is 2.3 seconds.
The 1-sigma cross-track error in the shadow position is 47.6 km.
The sky-plane scale is 3031.5 km/arcsec.
Diameter estimates:
58.3 km assuming a 5% albedo, aximum of 5.2 sec for a central chord
23.8 km assuming a 30% albedo, maximum of 2.1 sec for a central chord
Cross-track diameter of 58.3 km used for deployment plan.
Star training set for 2759_Idomeneus, (2025/03/28 23:56UT) Object RA Dec mag sep mel Regulus 10:09:42.8 +11:50:34 1.3 14.06 148 Alphard 09:28:49.7 -08:46:09 2.0 13.94 140 PPM 155539 09:13:31.9 +03:45:44 6.0 2.03 136 PPM 155692 09:21:10.7 +05:06:29 6.9 0.31 138 PPM 155663 09:19:15.9 +05:04:56 9.5 0.20 137 2759_Idomeneus 09:20:01.0 +04:59:55 15.0 138 Positions are for equinox of date
Star training set for 2759_Idomeneus, (2025/03/28 23:56UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 14.06 148 Alphard 09:27:35.2 -08:39:30 2.0 13.94 140 PPM 155539 09:12:12.8 +03:52:01 6.0 2.03 136 PPM 155692 09:19:51.1 +05:12:57 6.9 0.31 138 PPM 155663 09:17:56.3 +05:11:21 9.5 0.20 137 2759_Idomeneus 09:18:41.4 +05:06:22 15.0 138 Positions are for J2000