Occultation event with (7119) Hiera, event index number 856
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/03/27 05:39:20 UTC
J2000 position of star is 08:39:26.9 +04:58:57
Equinox of date position of star is 08:40:46.8 +04:53:32
Star is 151 degrees from the moon. Moon is 7% illuminated.
Stellar brightness G=14.5, apparent brightess of occulting body is G=15.0
Use an exposure time of 0.50 seconds with the standard RECON-QHY system.
Expected flux drop is 38% with SNR of 9.4 per integration
Apparent velocity is 4.9 km/sec on the sky relative to the star, or, 5.5 arcsec/hr.
The recommended exposure time corresponds to 2.5 km per image.
The 1-sigma error in the time of the event is 6.2 seconds.
The 1-sigma cross-track error in the shadow position is 31.6 km.
The sky-plane scale is 3245.5 km/arcsec.
Diameter estimates:
66.1 km assuming a 5% albedo, aximum of 13.4 sec for a central chord
27.0 km assuming a 30% albedo, maximum of 5.5 sec for a central chord
Cross-track diameter of 66.1 km used for deployment plan.
Star training set for 7119_Hiera, (2025/03/27 05:39UT) Object RA Dec mag sep mel Regulus 10:09:42.8 +11:50:34 1.3 23.05 174 Alphard 09:28:49.7 -08:46:09 2.0 18.17 154 4Del Hya 08:38:59.4 +05:36:51 4.2 0.85 151 PPM 154872 08:43:44.8 +04:29:06 7.8 0.84 152 PPM 154800 08:40:30.5 +04:51:42 9.8 0.07 151 7119_Hiera 08:40:46.8 +04:53:32 15.0 151 Positions are for equinox of date
Star training set for 7119_Hiera, (2025/03/27 05:39UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 23.05 174 Alphard 09:27:35.2 -08:39:30 2.0 18.17 154 4Del Hya 08:37:39.3 +05:42:13 4.2 0.85 151 PPM 154872 08:42:25.2 +04:34:36 7.8 0.84 152 PPM 154800 08:39:10.7 +04:57:06 9.8 0.07 151 7119_Hiera 08:39:26.9 +04:58:57 15.0 151 Positions are for J2000