Event between (129772) 99HR11 and star GA0760:05000353 with event index number of 1119928
Geocentric closest approach at 2021/05/05 11:34:03 UTC
J2000 position of star is 14:32:30.9 -12:32:08
Equinox of date position of star is 14:33:40.4 -12:37:43
Stellar brightness G=16.3,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 115 degrees from the moon.
Moon is 33% illuminated.
TNO apparent brightness V=23.4
TNO is 42.2 AU from the Sun
and 41.2 AU from the Earth.
The TNO is moving 24.8
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 110 seconds.
The 1-sigma cross-track error in the shadow position is
1916 km.
The TNO has an absolute magnitude Hv=7.2
Diameter=218.8 km assuming a 5% albedo -- 8.8 sec chord
Diameter=89.3 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 7:4EEE
Star training set for 129772, (2021/05/05 11:34UT) Object RA Dec mag sep mel Spica 13:26:19.2 -11:16:19 1.0 16.53 131 27Bet Lib 15:18:09.5 -09:27:37 2.6 11.36 106 PPM 229046 14:38:08.1 -12:23:42 6.2 1.11 114 PPM 228927 14:32:56.7 -13:17:06 8.3 0.68 115 PPM 228933 14:33:06.3 -12:49:04 8.9 0.23 115 129772 14:33:40.5 -12:37:44 16.3 115 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, (2021/05/05 11:34UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 16.53 131 27Bet Lib 15:17:00.3 -09:22:59 2.6 11.36 106 PPM 229046 14:36:58.5 -12:18:12 6.2 1.11 114 PPM 228927 14:31:46.9 -13:11:30 8.3 0.68 115 PPM 228933 14:31:56.7 -12:43:27 8.9 0.23 115 129772 14:32:30.9 -12:32:08 16.3 115 Positions are for J2000
Event circumstances last updated at 2021/04/21 22:32:15 UT
Marc W. Buie, Southwest Research Institute