Occultation event with (7119) Hiera, event index number 3170
Regions able to see the event: Australia
Geocentric closest approach at 2026/01/24 17:49:05 UTC
J2000 position of star is 11:06:06.8 -15:19:57
Equinox of date position of star is 11:07:24.7 -15:28:26
Star is 153 degrees from the moon. Moon is 34% illuminated.
Stellar brightness G=14.2, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.35 seconds with the standard RECON-QHY system.
SNR of 9.2 per integration for unocculted signal
Expected flux drop is 70% with SNR of 6.4 for the occulted depth (per occulted point)
Apparent velocity is 11.7 km/sec on the sky relative to the star, or, 12.4 arcsec/hr.
Position angle of asteroid motion is 63.0 degrees
The recommended exposure time corresponds to 4.1 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 37.5 km.
The sky-plane scale is 3379.7 km/arcsec.
Diameter estimates:
66.4 km assuming a 5% albedo, maximum of 5.7 sec for a central chord
27.1 km assuming a 30% albedo, maximum of 2.3 sec for a central chord
Cross-track diameter of 59.2 km used for deployment plan.
Star training set for 7119_Hiera, (2026/01/24 17:49UT) Object RA Dec mag sep mel Regulus 10:09:45.5 +11:50:20 1.3 30.81 134 4Gam Crv 12:17:09.0 -17:41:11 2.6 16.85 167 PPM 223760 11:00:48.3 -16:29:38 5.3 1.89 151 PPM 223962 11:08:38.7 -15:30:03 8.1 0.30 153 PPM 223909 11:06:43.6 -15:37:40 9.8 0.23 153 7119_Hiera 11:07:24.7 -15:28:26 15.2 153 Positions are for equinox of date
Star training set for 7119_Hiera, (2026/01/24 17:49UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 30.81 134 4Gam Crv 12:15:48.1 -17:32:30 2.6 16.85 167 PPM 223760 10:59:30.8 -16:21:13 5.3 1.89 151 PPM 223962 11:07:20.7 -15:21:34 8.1 0.30 153 PPM 223909 11:05:25.7 -15:29:12 9.8 0.23 153 7119_Hiera 11:06:06.8 -15:19:57 15.2 153 Positions are for J2000