Occultation event with (4709) Ennomos, event index number 4750
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/11/18 08:28:01 UTC
J2000 position of star is 06:00:18.9 +17:18:38
Equinox of date position of star is 06:01:52.8 +17:18:35
Star is 114 degrees from the moon. Moon is 59% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=13.8
Use an exposure time of 1.50 seconds with the standard RECON-QHY system.
SNR of 4.3 per integration for unocculted signal
Expected flux drop is 12% with SNR of 0.5 for the occulted depth (per occulted point)
Apparent velocity is 15.2 km/sec on the sky relative to the star, or, 16.8 arcsec/hr.
Position angle of asteroid motion is 62.2 degrees
The recommended exposure time corresponds to 22.7 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 41.7 km.
The sky-plane scale is 3241.2 km/arcsec.
Diameter estimates:
114.3 km assuming a 5% albedo, maximum of 7.5 sec for a central chord
46.7 km assuming a 30% albedo, maximum of 3.1 sec for a central chord
Cross-track diameter of 91.4 km used for deployment plan.
Star training set for 4709_Ennomos, (2026/11/18 08:28UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.7 +07:24:35 0.4 9.98 112 Alhena 06:39:15.9 +16:22:26 1.9 8.99 123 64 Ori 06:05:02.8 +19:41:16 4.9 2.49 115 PPM 121757 06:02:39.2 +16:59:25 7.9 0.37 114 PPM 121732 06:01:50.8 +17:07:07 8.8 0.19 114 4709_Ennomos 06:01:52.8 +17:18:35 13.8 115 Positions are for equinox of date
Star training set for 4709_Ennomos, (2026/11/18 08:28UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 9.98 112 Alhena 06:37:42.8 +16:23:56 1.9 8.99 123 64 Ori 06:03:27.3 +19:41:26 4.9 2.49 115 PPM 121757 06:01:05.6 +16:59:29 7.9 0.37 114 PPM 121732 06:00:17.1 +17:07:09 8.8 0.19 114 4709_Ennomos 06:00:18.9 +17:18:38 13.8 114 Positions are for J2000