Occultation event with (7119) Hiera, event index number 3531
Regions able to see the event: SAmericaN
Geocentric closest approach at 2026/03/28 21:36:56 UTC
J2000 position of star is 10:36:24.3 -14:15:35
Equinox of date position of star is 10:37:41.9 -14:23:46
Star is 36 degrees from the moon. Moon is 82% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=14.9
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 8.9 per integration for unocculted signal
Expected flux drop is 48% with SNR of 4.3 for the occulted depth (per occulted point)
Apparent velocity is 15.7 km/sec on the sky relative to the star, or, 17.4 arcsec/hr.
Position angle of asteroid motion is 120.1 degrees
The recommended exposure time corresponds to 14.1 km per image.
The 1-sigma error in the time of the event is 2.1 seconds.
The 1-sigma cross-track error in the shadow position is 17.0 km.
The sky-plane scale is 3245.3 km/arcsec.
Diameter estimates:
66.4 km assuming a 5% albedo, maximum of 4.2 sec for a central chord
27.1 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 59.2 km used for deployment plan.
Star training set for 7119_Hiera, (2026/03/28 21:37UT) Object RA Dec mag sep mel Regulus 10:09:46.0 +11:50:17 1.3 27.13 12 Alphard 09:28:52.6 -08:46:25 2.0 17.76 26 PPM 223226 10:38:51.1 -13:31:19 4.8 0.92 36 PPM 223115 10:34:23.5 -14:53:19 8.1 0.94 36 PPM 223181 10:37:10.1 -14:38:18 9.5 0.27 36 7119_Hiera 10:37:41.9 -14:23:46 14.9 37 Positions are for equinox of date
Star training set for 7119_Hiera, (2026/03/28 21:37UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 27.13 12 Alphard 09:27:35.2 -08:39:30 2.0 17.76 26 PPM 223226 10:37:33.4 -13:23:06 4.8 0.92 36 PPM 223115 10:33:06.2 -14:45:10 8.1 0.94 36 PPM 223181 10:35:52.6 -14:30:06 9.5 0.27 36 7119_Hiera 10:36:24.3 -14:15:35 14.9 36 Positions are for J2000