Occultation event with (4709) Ennomos, event index number 3320
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/02/27 00:45:45 UTC
J2000 position of star is 03:22:46.9 +22:32:37
Equinox of date position of star is 03:24:18.7 +22:38:07
Star is 47 degrees from the moon. Moon is 77% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=14.4
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 52% with SNR of 5.1 for the occulted depth (per occulted point)
Apparent velocity is 20.0 km/sec on the sky relative to the star, or, 18.3 arcsec/hr.
Position angle of asteroid motion is 97.0 degrees
The recommended exposure time corresponds to 9.0 km per image.
The 1-sigma error in the time of the event is 0.6 seconds.
The 1-sigma cross-track error in the shadow position is 38.0 km.
The sky-plane scale is 3927.9 km/arcsec.
Diameter estimates:
114.3 km assuming a 5% albedo, maximum of 5.7 sec for a central chord
46.7 km assuming a 30% albedo, maximum of 2.3 sec for a central chord
Cross-track diameter of 91.4 km used for deployment plan.
Star training set for 4709_Ennomos, (2026/02/27 00:46UT) Object RA Dec mag sep mel Aldebaran 04:37:25.5 +16:33:35 0.8 18.24 33 44Zet Per 03:55:47.0 +31:57:33 2.8 11.65 39 61Tau1Ari 03:22:44.6 +21:14:22 5.3 1.44 48 PPM 092475 03:26:06.0 +22:07:52 6.9 0.65 47 PPM 092444 03:24:03.5 +22:54:07 9.8 0.27 47 4709_Ennomos 03:24:18.7 +22:38:07 14.4 47 Positions are for equinox of date
Star training set for 4709_Ennomos, (2026/02/27 00:46UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 18.24 33 44Zet Per 03:54:07.9 +31:53:01 2.8 11.65 39 61Tau1Ari 03:21:13.7 +21:08:49 5.3 1.44 48 PPM 092475 03:24:34.5 +22:02:24 6.9 0.65 47 PPM 092444 03:22:31.6 +22:48:36 9.8 0.27 47 4709_Ennomos 03:22:46.9 +22:32:37 14.4 47 Positions are for J2000