Event between (129772) 99HR11 and star GA0740:05369908 with event index number of 1884627
Geocentric closest approach at 2028/05/16 17:30:12 UTC
J2000 position of star is 15:08:46.6 -15:40:33
Equinox of date position of star is 15:10:07.8 -15:46:02
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 100 degrees from the moon.
Moon is 47% illuminated.
Apparent brightness V=23.5
Object is 42.2 AU from the Sun
and 41.2 AU from the Earth.
Apparent velocity is 24.6
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 323 seconds.
The 1-sigma cross-track error in the shadow position is
3924 km.
The object has an absolute magnitude Hv=7.3
Diameter=218.8 km assuming a 5% albedo -- 8.6 sec chord
Diameter=89.3 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is 7:4EEE
Star training set for 129772, (2028/05/16 17:30UT) Object RA Dec mag sep mel Antares 16:31:09.1 -26:29:33 0.9 21.62 80 27Bet Lib 15:18:32.3 -09:29:09 2.6 6.61 99 21Nu Lib 15:08:12.9 -16:21:54 5.2 0.78 101 PPM 229784 15:09:01.1 -15:31:28 8.1 0.41 101 PPM 229808 15:10:09.1 -15:47:17 9.4 0.05 100 129772 15:10:21.7 -15:46:58 16.9 100 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 129772, (2028/05/16 17:30UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 21.62 80 27Bet Lib 15:17:00.3 -09:22:59 2.6 6.61 99 21Nu Lib 15:06:37.6 -16:15:25 5.2 0.78 101 PPM 229784 15:07:26.1 -15:25:01 8.1 0.41 101 PPM 229808 15:08:34.0 -15:40:52 9.4 0.05 100 129772 15:08:46.6 -15:40:33 16.9 100 Positions are for J2000
Event circumstances last updated at 2024/03/21 22:35:26 UT
Marc W. Buie, Southwest Research Institute