Event between (503858) 98HQ151 and star GA0760:20415536 with event index number of 1061238
Geocentric closest approach at 2021/03/08 00:44:54 UTC
J2000 position of star is 19:01:18.2 -12:58:36
Equinox of date position of star is 19:02:29.2 -12:56:44
Stellar brightness G=17.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 12 degrees from the moon.
Moon is 29% illuminated.
TNO apparent brightness V=24.2
TNO is 32.9 AU from the Sun
and 33.4 AU from the Earth.
The TNO is moving 20.4
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 628 seconds.
The 1-sigma cross-track error in the shadow position is
4969 km.
The TNO has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 5.1 sec chord
Diameter=42.8 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is 3:2E
Star training set for 503858, (2021/03/08 00:45UT) Object RA Dec mag sep mel Antares 16:30:42.6 -26:28:38 0.9 38.02 33 Nunki 18:56:34.6 -26:16:07 2.0 13.40 1 PPM 235374 19:02:46.1 -15:15:04 6.5 2.31 10 PPM 235393 19:03:25.0 -13:13:19 8.2 0.36 12 PPM 235365 19:02:20.8 -12:57:30 8.9 0.04 12 503858 19:02:29.6 -12:56:43 17.0 12 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 503858, (2021/03/08 00:45UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 38.02 33 Nunki 18:55:15.9 -26:17:49 2.0 13.40 1 PPM 235374 19:01:33.5 -15:16:58 6.5 2.31 10 PPM 235393 19:02:13.4 -13:15:14 8.2 0.36 12 PPM 235365 19:01:09.4 -12:59:23 8.9 0.04 12 503858 19:01:18.2 -12:58:36 17.0 12 Positions are for J2000
Event circumstances last updated at 2021/01/19 20:51:58 UT
Marc W. Buie, Southwest Research Institute