Occultation event with (7119) Hiera, event index number 3831
Regions able to see the event: SAfrica
Geocentric closest approach at 2026/07/06 19:28:18 UTC
J2000 position of star is 10:49:19.0 -11:21:30
Equinox of date position of star is 10:50:38.4 -11:29:57
Star is 160 degrees from the moon. Moon is 61% illuminated.
Stellar brightness G=14.4, apparent brightess of occulting body is G=15.7
Use an exposure time of 0.45 seconds with the standard RECON-QHY system.
SNR of 10.0 per integration for unocculted signal
Expected flux drop is 77% with SNR of 7.7 for the occulted depth (per occulted point)
Apparent velocity is 25.8 km/sec on the sky relative to the star, or, 22.2 arcsec/hr.
Position angle of asteroid motion is 100.0 degrees
The recommended exposure time corresponds to 11.6 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 28.0 km.
The sky-plane scale is 4187.9 km/arcsec.
Diameter estimates:
66.4 km assuming a 5% albedo, maximum of 2.6 sec for a central chord
27.1 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 59.2 km used for deployment plan.
Star training set for 7119_Hiera, (2026/07/06 19:28UT) Object RA Dec mag sep mel Regulus 10:09:46.9 +11:50:12 1.3 25.44 147 Alphard 09:28:53.4 -08:46:29 2.0 20.30 141 PPM 193828 10:51:03.2 -09:59:37 5.5 1.51 160 PPM 223510 10:50:52.0 -12:06:07 8.2 0.61 160 PPM 223514 10:51:03.2 -11:15:05 9.2 0.27 160 7119_Hiera 10:50:38.4 -11:29:57 15.7 160 Positions are for equinox of date
Star training set for 7119_Hiera, (2026/07/06 19:28UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 25.44 147 Alphard 09:27:35.2 -08:39:30 2.0 20.30 141 PPM 193828 10:49:43.5 -09:51:10 5.5 1.51 160 PPM 223510 10:49:32.8 -11:57:40 8.2 0.61 160 PPM 223514 10:49:43.8 -11:06:38 9.2 0.27 160 7119_Hiera 10:49:19.0 -11:21:30 15.7 160 Positions are for J2000