Event between (487581) 15BE519 and star UC4-505-053719 with event index number of 186067
Geocentric closest approach at 2018/02/16 14:38:36 UTC
J2000 position of star is 11:16:54.5 +10:51:52
Equinox of date position of star is 11:17:50.4 +10:45:59
Stellar brightness R=16.0,
use SENSEUP=128
Star is 170 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=22.2
TNO is 47.2 AU from the Sun
and 46.2 AU from the Earth.
The TNO is moving 24.7
km/sec on the sky relative to the star, or,
2.7 arcsec/hr.
The 1-sigma error in the time of the event is 255 seconds.
The 1-sigma cross-track error in the shadow position is
4028 km.
The TNO has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 19.4 sec chord
Diameter=195.4 km assuming a 30% albedo -- 7.9 sec chord
Dynamical classification is SCATNEAR
Star training set for 487581, (2018/02/16 14:39UT) Object RA Dec mag sep mel Regulus 10:09:20.1 +11:52:41 1.3 16.83 174 Denebola 11:49:59.0 +14:28:14 2.1 8.67 161 PPM 128238 11:25:55.3 +11:19:50 5.8 2.06 168 PPM 128074 11:14:14.7 +10:20:54 8.2 0.98 170 PPM 128101 11:16:17.9 +10:50:42 9.4 0.39 170 PPM 128129 11:17:51.3 +10:29:21 10.2 0.28 170 487581 11:17:51.1 +10:45:55 16.0 169 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 487581, (2018/02/16 14:39UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 16.83 174 Denebola 11:49:03.0 +14:34:17 2.1 8.67 161 PPM 128238 11:24:58.8 +11:25:49 5.8 2.06 168 PPM 128074 11:13:18.1 +10:26:50 8.2 0.98 170 PPM 128101 11:15:21.3 +10:56:38 9.4 0.39 170 PPM 128129 11:16:54.8 +10:35:18 10.2 0.28 170 487581 11:16:54.5 +10:51:52 16.0 170 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:17:05 UT
Marc W. Buie, Southwest Research Institute