Event between (281371) 08FC76 and star UC4-500-018822 with event index number of 318677
Geocentric closest approach at 2019/12/28 16:28:01 UTC
J2000 position of star is 06:01:39.9 +09:59:15
Equinox of date position of star is 06:02:42.9 +09:59:11
Stellar brightness R=16.8,
use SENSEUP=128
Star is 142 degrees from the moon.
Moon is 6% illuminated.
TNO apparent brightness V=20.0
TNO is 11.8 AU from the Sun
and 10.9 AU from the Earth.
The TNO is moving 22.0
km/sec on the sky relative to the star, or,
10.0 arcsec/hr.
The 1-sigma error in the time of the event is 37 seconds.
The 1-sigma cross-track error in the shadow position is
508 km.
The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 3.8 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
Star training set for 281371, (2019/12/28 16:28UT) Object RA Dec mag sep mel Betelgeuse 05:56:15.3 +07:24:33 0.4 3.04 139 Bellatrix 05:26:12.3 +06:21:58 1.6 9.74 132 PPM 121823 06:04:31.8 +11:40:44 6.0 1.75 142 PPM 149749 06:01:25.7 +09:42:05 8.3 0.44 141 PPM 149791 06:02:40.9 +09:58:37 9.2 0.02 141 281371 06:02:46.0 +09:59:11 16.8 142 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 281371, (2019/12/28 16:28UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 3.04 139 Bellatrix 05:25:07.8 +06:20:58 1.6 9.74 132 PPM 121823 06:03:24.8 +11:40:51 6.0 1.75 142 PPM 149749 06:00:19.7 +09:42:07 8.3 0.44 141 PPM 149791 06:01:34.7 +09:58:41 9.2 0.02 141 281371 06:01:39.9 +09:59:15 16.8 141 Positions are for J2000
Event circumstances last updated at 2019/01/17 22:01:01 UT
Marc W. Buie, Southwest Research Institute