Event between 04LR31 and star GA0840:19995477 with event index number of 211052
Geocentric closest approach at 2019/09/04 23:10:54 UTC
J2000 position of star is 23:05:07.0 -05:59:25
Equinox of date position of star is 23:06:07.4 -05:53:07
Stellar brightness G=14.9,
use SENSEUP=128
Star is 107 degrees from the moon.
Moon is 38% illuminated.
TNO apparent brightness V=21.5
TNO is 18.0 AU from the Sun
and 17.0 AU from the Earth.
The TNO is moving 22.7
km/sec on the sky relative to the star, or,
6.7 arcsec/hr.
The 1-sigma error in the time of the event is 46 seconds.
The 1-sigma cross-track error in the shadow position is
730 km.
The TNO has an absolute magnitude Hv=9.1
Diameter=90.0 km assuming a 5% albedo -- 4.0 sec chord
Diameter=36.7 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
Star training set for 04LR31, (2019/09/04 23:11UT) Object RA Dec mag sep mel Fomalhaut 22:58:44.0 -29:31:03 1.2 23.70 97 Markab 23:05:44.6 +15:18:41 2.5 21.20 113 82 Aqr 23:03:33.8 -06:28:05 6.0 0.87 106 PPM 207114 23:05:24.0 -06:35:00 7.8 0.72 107 PPM 207115 23:05:29.1 -06:04:23 8.6 0.25 107 04LR31 23:06:08.2 -05:53:02 14.9 108 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 04LR31, (2019/09/04 23:11UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.5 -29:37:23 1.2 23.70 97 Markab 23:04:45.7 +15:12:18 2.5 21.20 113 82 Aqr 23:02:32.5 -06:34:27 6.0 0.87 106 PPM 207114 23:04:22.8 -06:41:23 7.8 0.72 107 PPM 207115 23:04:27.9 -06:10:46 8.6 0.25 107 04LR31 23:05:07.0 -05:59:25 14.9 107 Positions are for J2000
Event circumstances last updated at 2019/06/07 22:37:57 UT
Marc W. Buie, Southwest Research Institute