Occultation event with (7119) Hiera, event index number 3403
Regions able to see the event: Europe
Geocentric closest approach at 2026/03/11 23:58:11 UTC
J2000 position of star is 10:44:24.2 -15:07:56
Equinox of date position of star is 10:45:41.7 -15:16:13
Star is 97 degrees from the moon. Moon is 44% illuminated.
Stellar brightness G=15.8, apparent brightess of occulting body is G=14.8
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 4.3 per integration for unocculted signal
Expected flux drop is 29% with SNR of 1.2 for the occulted depth (per occulted point)
Apparent velocity is 17.6 km/sec on the sky relative to the star, or, 19.8 arcsec/hr.
Position angle of asteroid motion is 108.9 degrees
The recommended exposure time corresponds to 14.1 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 23.9 km.
The sky-plane scale is 3202.0 km/arcsec.
Diameter estimates:
66.4 km assuming a 5% albedo, maximum of 3.8 sec for a central chord
27.1 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 59.2 km used for deployment plan.
Star training set for 7119_Hiera, (2026/03/11 23:58UT) Object RA Dec mag sep mel Regulus 10:09:45.9 +11:50:17 1.3 28.53 118 Alphard 09:28:52.5 -08:46:24 2.0 19.86 116 PPM 223341 10:43:49.0 -14:06:44 6.0 1.24 98 PPM 223375 10:45:06.6 -14:55:56 8.5 0.37 97 PPM 223381 10:45:26.7 -15:19:07 9.0 0.08 97 7119_Hiera 10:45:41.7 -15:16:13 14.8 96 Positions are for equinox of date
Star training set for 7119_Hiera, (2026/03/11 23:58UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 28.53 118 Alphard 09:27:35.2 -08:39:30 2.0 19.86 116 PPM 223341 10:42:31.3 -13:58:28 6.0 1.24 98 PPM 223375 10:43:49.0 -14:47:39 8.5 0.37 97 PPM 223381 10:44:09.2 -15:10:50 9.0 0.08 97 7119_Hiera 10:44:24.2 -15:07:56 14.8 97 Positions are for J2000