Occultation event with (4709) Ennomos, event index number 5106
Regions able to see the event: Europe,SAmericaN
Geocentric closest approach at 2026/12/08 01:24:46 UTC
J2000 position of star is 05:50:26.7 +16:18:31
Equinox of date position of star is 05:52:00.0 +16:18:52
Star is 155 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=15.5, 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 5.2 per integration for unocculted signal
Expected flux drop is 13% with SNR of 0.7 for the occulted depth (per occulted point)
Apparent velocity is 18.9 km/sec on the sky relative to the star, or, 21.6 arcsec/hr.
Position angle of asteroid motion is 70.3 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 41.4 km.
The sky-plane scale is 3156.1 km/arcsec.
Diameter estimates:
114.3 km assuming a 5% albedo, maximum of 6.0 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, (2026/12/08 01:25UT) Object RA Dec mag sep mel Betelgeuse 05:56:37.9 +07:24:35 0.4 8.98 149 Alhena 06:39:16.1 +16:22:26 1.9 11.34 144 131 Tau 05:48:45.2 +14:29:46 5.7 1.98 154 PPM 121449 05:51:35.4 +16:01:09 8.3 0.31 154 PPM 121453 05:51:51.2 +16:34:41 10.4 0.27 155 4709_Ennomos 05:52:00.0 +16:18:52 13.5 154 Positions are for equinox of date
Star training set for 4709_Ennomos, (2026/12/08 01:25UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 8.98 149 Alhena 06:37:42.8 +16:23:56 1.9 11.34 144 131 Tau 05:47:13.1 +14:29:18 5.7 1.98 154 PPM 121449 05:50:02.3 +16:00:47 8.3 0.31 154 PPM 121453 05:50:17.7 +16:34:20 10.4 0.27 155 4709_Ennomos 05:50:26.7 +16:18:31 13.5 155 Positions are for J2000