Occultation event with (7119) Hiera, event index number 3398
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/03/11 05:40:07 UTC
J2000 position of star is 10:44:48.0 -15:09:51
Equinox of date position of star is 10:46:05.5 -15:18:08
Star is 88 degrees from the moon. Moon is 52% illuminated.
Stellar brightness G=13.8, apparent brightess of occulting body is G=14.8
Use an exposure time of 0.20 seconds with the standard RECON-QHY system.
SNR of 8.8 per integration for unocculted signal
Expected flux drop is 73% with SNR of 6.4 for the occulted depth (per occulted point)
Apparent velocity is 17.7 km/sec on the sky relative to the star, or, 19.9 arcsec/hr.
Position angle of asteroid motion is 108.4 degrees
The recommended exposure time corresponds to 3.5 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 24.4 km.
The sky-plane scale is 3201.5 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 05:40UT) Object RA Dec mag sep mel Regulus 10:09:45.9 +11:50:17 1.3 28.59 109 Alphard 09:28:52.5 -08:46:24 2.0 19.96 108 PPM 223341 10:43:49.0 -14:06:44 6.0 1.31 89 PPM 223425 10:47:44.2 -15:10:22 7.8 0.42 88 PPM 223381 10:45:26.6 -15:19:07 9.0 0.16 88 7119_Hiera 10:46:05.5 -15:18:08 14.8 88 Positions are for equinox of date
Star training set for 7119_Hiera, (2026/03/11 05:40UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 28.59 109 Alphard 09:27:35.2 -08:39:30 2.0 19.96 108 PPM 223341 10:42:31.3 -13:58:28 6.0 1.31 89 PPM 223425 10:46:26.7 -15:02:03 7.8 0.42 88 PPM 223381 10:44:09.2 -15:10:50 9.0 0.16 88 7119_Hiera 10:44:48.0 -15:09:51 14.8 88 Positions are for J2000