Occultation event with (4709) Ennomos, event index number 3934
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/08/04 04:03:30 UTC
J2000 position of star is 05:35:33.2 +21:57:55
Equinox of date position of star is 05:37:09.3 +21:58:50
Star is 67 degrees from the moon. Moon is 71% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=14.5
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 16% with SNR of 0.5 for the occulted depth (per occulted point)
Apparent velocity is 31.9 km/sec on the sky relative to the star, or, 26.7 arcsec/hr.
Position angle of asteroid motion is 98.4 degrees
The recommended exposure time corresponds to 31.9 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 35.6 km.
The sky-plane scale is 4301.0 km/arcsec.
Diameter estimates:
114.3 km assuming a 5% albedo, maximum of 3.6 sec for a central chord
46.7 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 91.4 km used for deployment plan.
Star training set for 4709_Ennomos, (2026/08/04 04:03UT) Object RA Dec mag sep mel Aldebaran 04:37:27.0 +16:33:38 0.8 15.09 53 Alnath 05:27:58.5 +28:37:38 1.6 6.96 65 PPM 094621 05:41:03.0 +21:46:32 6.4 0.93 68 PPM 094553 05:38:02.2 +22:00:25 7.5 0.21 67 PPM 094537 05:37:24.1 +22:05:53 10.0 0.13 67 4709_Ennomos 05:37:09.3 +21:58:50 14.5 68 Positions are for equinox of date
Star training set for 4709_Ennomos, (2026/08/04 04:03UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 15.09 53 Alnath 05:26:17.6 +28:36:22 1.6 6.96 65 PPM 094621 05:39:27.1 +21:45:46 6.4 0.93 68 PPM 094553 05:36:26.2 +21:59:32 7.5 0.21 67 PPM 094537 05:35:48.0 +22:04:59 10.0 0.13 67 4709_Ennomos 05:35:33.2 +21:57:55 14.5 67 Positions are for J2000