Event between (129772) 99HR11 and star GA0740:05309851 with event index number of 1398872
Geocentric closest approach at 2025/03/30 00:07:18 UTC
J2000 position of star is 14:56:16.3 -14:36:16
Equinox of date position of star is 14:57:36.7 -14:42:04
Stellar brightness G=15.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 151 degrees from the moon.
Moon is 0% illuminated.
Apparent brightness V=23.6
Object is 42.2 AU from the Sun
and 41.4 AU from the Earth.
Apparent velocity is 19.0
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 306 seconds.
The 1-sigma cross-track error in the shadow position is
3140 km.
The object has an absolute magnitude Hv=7.3
Diameter=218.8 km assuming a 5% albedo -- 11.2 sec chord
Diameter=89.3 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 7:4EEE
Star training set for 129772, (2025/03/30 00:07UT) Object RA Dec mag sep mel Spica 13:26:31.6 -11:17:32 1.0 22.45 173 27Bet Lib 15:18:22.2 -09:28:28 2.6 7.28 146 7Mu Lib 14:50:42.3 -14:15:09 5.8 1.74 153 PPM 229503 14:57:16.6 -14:00:06 8.0 0.71 151 PPM 229523 14:58:14.2 -14:35:29 9.3 0.18 151 129772 14:57:40.0 -14:42:18 15.5 151 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, (2025/03/30 00:07UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 22.45 173 27Bet Lib 15:17:00.3 -09:22:59 2.6 7.28 146 7Mu Lib 14:49:18.9 -14:08:56 5.8 1.74 153 PPM 229503 14:55:53.2 -13:54:03 8.0 0.71 151 PPM 229523 14:56:50.4 -14:29:28 9.3 0.18 151 129772 14:56:16.3 -14:36:16 15.5 151 Positions are for J2000
Event circumstances last updated at 2024/03/21 22:29:56 UT
Marc W. Buie, Southwest Research Institute