Occultation event with (7119) Hiera, event index number 3811
Regions able to see the event: Australia
Geocentric closest approach at 2026/06/29 08:04:04 UTC
J2000 position of star is 10:45:03.0 -11:11:56
Equinox of date position of star is 10:46:22.2 -11:20:19
Star is 101 degrees from the moon. Moon is 99% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 37% with SNR of 1.2 for the occulted depth (per occulted point)
Apparent velocity is 23.1 km/sec on the sky relative to the star, or, 20.2 arcsec/hr.
Position angle of asteroid motion is 97.2 degrees
The recommended exposure time corresponds to 18.5 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 28.6 km.
The sky-plane scale is 4111.0 km/arcsec.
Diameter estimates:
66.4 km assuming a 5% albedo, maximum of 2.9 sec for a central chord
27.1 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 59.2 km used for deployment plan.
Star training set for 7119_Hiera, (2026/06/29 08:04UT) Object RA Dec mag sep mel Regulus 10:09:46.8 +11:50:12 1.3 24.89 120 Alphard 09:28:53.4 -08:46:29 2.0 19.24 118 PPM 193828 10:51:03.1 -09:59:37 5.5 1.77 101 PPM 223392 10:46:05.5 -11:02:57 8.5 0.30 101 PPM 223403 10:46:53.0 -11:13:07 9.4 0.17 101 7119_Hiera 10:46:22.2 -11:20:19 15.7 101 Positions are for equinox of date
Star training set for 7119_Hiera, (2026/06/29 08:04UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 24.89 120 Alphard 09:27:35.2 -08:39:30 2.0 19.24 118 PPM 193828 10:49:43.5 -09:51:10 5.5 1.77 101 PPM 223392 10:44:46.3 -10:54:34 8.5 0.30 101 PPM 223403 10:45:33.7 -11:04:44 9.4 0.17 101 7119_Hiera 10:45:03.0 -11:11:56 15.7 101 Positions are for J2000