Event between (118378) 99HT11 and star GA0700:06142655 with event index number of 1376490
Geocentric closest approach at 2025/07/13 14:25:12 UTC
J2000 position of star is 16:03:58.7 -18:36:49
Equinox of date position of star is 16:05:22.7 -18:40:43
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 82 degrees from the moon.
Moon is 92% illuminated.
Apparent brightness V=23.3
Object is 39.4 AU from the Sun
and 38.7 AU from the Earth.
Apparent velocity is 14.5
km/sec on the sky relative to the star, or,
1.9 arcsec/hr.
The 1-sigma error in the time of the event is 540 seconds.
The 1-sigma cross-track error in the shadow position is
3108 km.
The object has an absolute magnitude Hv=7.3
Diameter=182.0 km assuming a 5% albedo -- 14.7 sec chord
Diameter=74.3 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is 7:4EEE
Star training set for 118378, (2025/07/13 14:25UT) Object RA Dec mag sep mel Antares 16:30:58.6 -26:29:11 0.9 9.77 75 8Bet1Sco 16:06:55.5 -19:52:24 2.6 1.24 82 8Bet2Sco 16:06:56.0 -19:52:10 5.1 1.24 82 PPM 231166 16:06:31.4 -18:36:28 6.7 0.26 82 PPM 231156 16:06:02.1 -18:27:34 10.0 0.26 82 118378 16:05:27.3 -18:40:56 16.9 82 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 118378, (2025/07/13 14:25UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 9.77 75 8Bet1Sco 16:05:26.2 -19:48:20 2.6 1.24 82 8Bet2Sco 16:05:26.7 -19:48:07 5.1 1.24 82 PPM 231166 16:05:02.8 -18:32:23 6.7 0.26 82 PPM 231156 16:04:33.6 -18:23:28 10.0 0.26 82 118378 16:03:58.7 -18:36:49 16.9 82 Positions are for J2000
Event circumstances last updated at 2024/03/21 22:30:05 UT
Marc W. Buie, Southwest Research Institute