Occultation event with (4709) Ennomos, event index number 4111
Regions able to see the event: Australia
Geocentric closest approach at 2026/08/27 19:22:56 UTC
J2000 position of star is 05:51:34.3 +21:13:38
Equinox of date position of star is 05:53:10.1 +21:13:55
Star is 118 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=15.2, apparent brightess of occulting body is G=14.4
Use an exposure time of 0.95 seconds with the standard RECON-QHY system.
SNR of 7.3 per integration for unocculted signal
Expected flux drop is 32% with SNR of 2.4 for the occulted depth (per occulted point)
Apparent velocity is 23.9 km/sec on the sky relative to the star, or, 21.1 arcsec/hr.
Position angle of asteroid motion is 104.9 degrees
The recommended exposure time corresponds to 22.7 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 31.9 km.
The sky-plane scale is 4078.6 km/arcsec.
Diameter estimates:
114.3 km assuming a 5% albedo, maximum of 4.8 sec for a central chord
46.7 km assuming a 30% albedo, maximum of 1.9 sec for a central chord
Cross-track diameter of 91.4 km used for deployment plan.
Star training set for 4709_Ennomos, (2026/08/27 19:23UT) Object RA Dec mag sep mel Betelgeuse 05:56:36.9 +07:24:35 0.4 13.85 117 Alnath 05:27:58.8 +28:37:39 1.6 9.34 112 54Chi1Ori 05:55:57.7 +20:16:43 5.1 1.16 118 PPM 094925 05:50:48.5 +21:08:33 7.1 0.56 117 PPM 094982 05:53:14.3 +21:03:13 9.5 0.18 118 4709_Ennomos 05:53:10.1 +21:13:55 14.4 118 Positions are for equinox of date
Star training set for 4709_Ennomos, (2026/08/27 19:23UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 13.85 117 Alnath 05:26:17.6 +28:36:22 1.6 9.34 112 54Chi1Ori 05:54:22.6 +20:16:32 5.1 1.16 118 PPM 094925 05:49:12.8 +21:08:09 7.1 0.56 117 PPM 094982 05:51:38.6 +21:02:55 9.5 0.18 118 4709_Ennomos 05:51:34.3 +21:13:38 14.4 118 Positions are for J2000