Occultation event with (4709) Ennomos, event index number 5093
Regions able to see the event: SMexico
Geocentric closest approach at 2026/12/07 08:24:29 UTC
J2000 position of star is 05:50:50.6 +16:20:36
Equinox of date position of star is 05:52:24.0 +16:20:56
Star is 147 degrees from the moon. Moon is 3% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=13.5
Use an exposure time of 1.20 seconds with the standard RECON-QHY system.
SNR of 3.4 per integration for unocculted signal
Expected flux drop is 9% with SNR of 0.3 for the occulted depth (per occulted point)
Apparent velocity is 18.9 km/sec on the sky relative to the star, or, 21.5 arcsec/hr.
Position angle of asteroid motion is 70.1 degrees
The recommended exposure time corresponds to 22.6 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 42.5 km.
The sky-plane scale is 3157.8 km/arcsec.
Diameter estimates:
114.3 km assuming a 5% albedo, maximum of 6.1 sec for a central chord
46.7 km assuming a 30% albedo, maximum of 2.5 sec for a central chord
Cross-track diameter of 91.4 km used for deployment plan.
Star training set for 4709_Ennomos, (2026/12/07 08:24UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.8 +07:24:35 0.4 9.00 142 Alhena 06:39:16.0 +16:22:26 1.9 11.24 136 131 Tau 05:48:45.2 +14:29:46 5.7 2.05 147 PPM 121449 05:51:35.4 +16:01:09 8.3 0.38 147 PPM 121453 05:51:51.2 +16:34:41 10.4 0.26 147 4709_Ennomos 05:52:24.0 +16:20:56 13.5 146 Positions are for equinox of date
Star training set for 4709_Ennomos, (2026/12/07 08:24UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 9.00 142 Alhena 06:37:42.8 +16:23:56 1.9 11.24 136 131 Tau 05:47:13.1 +14:29:18 5.7 2.05 147 PPM 121449 05:50:02.3 +16:00:47 8.3 0.38 147 PPM 121453 05:50:17.7 +16:34:20 10.4 0.26 147 4709_Ennomos 05:50:50.6 +16:20:36 13.5 147 Positions are for J2000