Event between 04OP15 and star UC4-389-131024 with event index number of 208117
Geocentric closest approach at 2018/03/31 02:00:26 UTC
J2000 position of star is 20:29:04.0 -12:14:34
Equinox of date position of star is 20:30:03.3 -12:10:56
Stellar brightness R=15.2,
use SENSEUP=128
Star is 121 degrees from the moon.
Moon is 100% illuminated.
TNO apparent brightness V=23.0
TNO is 38.0 AU from the Sun
and 38.4 AU from the Earth.
The TNO is moving 18.9
km/sec on the sky relative to the star, or,
2.4 arcsec/hr.
The 1-sigma error in the time of the event is 365 seconds.
The 1-sigma cross-track error in the shadow position is
4057 km.
The TNO has an absolute magnitude Hv=7.0
Diameter=237.7 km assuming a 5% albedo -- 12.6 sec chord
Diameter=97.0 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is SCATEXTD
Star training set for 04OP15, (2018/03/31 02:00UT) Object RA Dec mag sep mel Fomalhaut 22:58:39.3 -29:31:31 1.2 38.56 146 Tarazed 19:47:07.6 +10:39:32 2.7 25.21 110 PPM 237602 20:35:12.5 -13:39:26 6.1 1.94 122 PPM 237524 20:31:27.2 -12:10:15 8.2 0.34 121 PPM 237505 20:30:44.6 -12:11:59 9.6 0.17 121 04OP15 20:30:04.3 -12:10:52 15.2 121 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 04OP15, (2018/03/31 02:00UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.5 -29:37:23 1.2 38.56 146 Tarazed 19:46:15.6 +10:36:48 2.7 25.21 110 PPM 237602 20:34:11.8 -13:43:15 6.1 1.94 122 PPM 237524 20:30:26.9 -12:13:59 8.2 0.34 121 PPM 237505 20:29:44.3 -12:15:42 9.6 0.17 121 04OP15 20:29:04.0 -12:14:34 15.2 121 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:24:09 UT
Marc W. Buie, Southwest Research Institute