Event between (118378) 99HT11 and star GA0700:06318299 with event index number of 1466309
Geocentric closest approach at 2026/03/29 05:57:27 UTC
J2000 position of star is 16:18:04.8 -19:19:44
Equinox of date position of star is 16:19:29.6 -19:23:12
Stellar brightness G=16.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 104 degrees from the moon.
Moon is 85% illuminated.
Apparent brightness V=23.4
Object is 39.4 AU from the Sun
and 38.8 AU from the Earth.
Apparent velocity is 10.5
km/sec on the sky relative to the star, or,
1.3 arcsec/hr.
The 1-sigma error in the time of the event is 1099 seconds.
The 1-sigma cross-track error in the shadow position is
5709 km.
The object has an absolute magnitude Hv=7.3
Diameter=182.0 km assuming a 5% albedo -- 20.2 sec chord
Diameter=74.3 km assuming a 30% albedo -- 8.3 sec chord
Dynamical classification is 7:4EEE
Star training set for 118378, (2026/03/29 05:57UT) Object RA Dec mag sep mel Antares 16:31:01.2 -26:29:16 0.9 7.57 107 8Bet1Sco 16:06:58.0 -19:52:30 2.6 3.02 101 PPM 265352 16:18:31.5 -20:10:02 6.5 0.82 103 PPM 231502 16:20:20.4 -19:33:11 9.9 0.24 104 PPM 231486 16:19:49.3 -19:30:31 10.1 0.13 104 118378 16:19:36.7 -19:23:29 16.6 104 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, (2026/03/29 05:57UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 7.57 107 8Bet1Sco 16:05:26.2 -19:48:20 2.6 3.02 101 PPM 265352 16:16:59.2 -20:06:15 6.5 0.82 103 PPM 231502 16:18:48.4 -19:29:28 9.9 0.24 104 PPM 231486 16:18:17.4 -19:26:47 10.1 0.13 104 118378 16:18:04.8 -19:19:44 16.6 104 Positions are for J2000
Event circumstances last updated at 2024/03/21 22:30:50 UT
Marc W. Buie, Southwest Research Institute