Event between (38084) 99HB12 and star GA0800:05196522 with event index number of 1416160
Geocentric closest approach at 2025/07/04 14:16:51 UTC
J2000 position of star is 16:27:16.2 -08:13:50
Equinox of date position of star is 16:28:35.3 -08:17:00
Stellar brightness G=15.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 38 degrees from the moon.
Moon is 67% illuminated.
Apparent brightness V=22.3
Object is 32.9 AU from the Sun
and 32.1 AU from the Earth.
Apparent velocity is 17.9
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 116 seconds.
The 1-sigma cross-track error in the shadow position is
1238 km.
The object has an absolute magnitude Hv=7.1
Diameter=231.2 km assuming a 5% albedo -- 13.0 sec chord
Diameter=94.4 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is 5:2EEE
Star training set for 38084, (2025/07/04 14:17UT) Object RA Dec mag sep mel Antares 16:30:58.5 -26:29:11 0.9 18.21 37 13Zet Oph 16:38:34.0 -10:37:00 2.6 3.38 40 3Ups Oph 16:29:11.1 -08:25:36 4.2 0.19 38 PPM 199656 16:27:35.3 -08:15:29 8.4 0.27 37 PPM 199685 16:29:03.9 -08:19:07 9.6 0.11 38 38084 16:28:39.2 -08:17:10 15.7 38 Positions are for equinox of date
Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.
Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.
Star training set for 38084, (2025/07/04 14:17UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 18.21 37 13Zet Oph 16:37:09.6 -10:34:01 2.6 3.38 40 3Ups Oph 16:27:48.0 -08:22:18 4.2 0.19 38 PPM 199656 16:26:12.3 -08:12:07 8.4 0.27 37 PPM 199685 16:27:40.9 -08:15:48 9.6 0.11 38 38084 16:27:16.2 -08:13:50 15.7 38 Positions are for J2000
Event circumstances last updated at 2024/04/23 03:22:28 UT
Marc W. Buie, Southwest Research Institute