Event between (5145) Pholus and star UC4-397-075147 with event index number of 316146
Geocentric closest approach at 2019/06/25 00:24:50 UTC
J2000 position of star is 18:03:41.6 -10:40:25
Equinox of date position of star is 18:04:44.2 -10:40:18
Stellar brightness R=13.0,
use SENSEUP=32
Star is 89 degrees from the moon.
Moon is 54% illuminated.
TNO apparent brightness V=21.6
TNO is 28.3 AU from the Sun
and 27.3 AU from the Earth.
The TNO is moving 25.7
km/sec on the sky relative to the star, or,
4.7 arcsec/hr.
The 1-sigma error in the time of the event is 141 seconds.
The 1-sigma cross-track error in the shadow position is
1804 km.
The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 8.9 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CENTAURR
Star training set for 5145, (2019/06/25 00:25UT) Object RA Dec mag sep mel Antares 16:30:36.3 -26:28:25 0.9 27.25 109 35Eta Oph 17:11:29.8 -15:44:52 2.6 13.92 101 64Nu Oph 18:00:06.0 -09:46:28 3.3 1.46 90 PPM 234011 18:06:36.3 -11:01:02 7.7 0.57 89 PPM 233958 18:04:19.7 -10:51:37 9.0 0.22 89 5145 18:04:46.4 -10:40:18 13.0 89 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 5145, (2019/06/25 00:25UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 27.25 109 35Eta Oph 17:10:22.7 -15:43:29 2.6 13.92 101 64Nu Oph 17:59:01.6 -09:46:27 3.3 1.46 90 PPM 234011 18:05:31.3 -11:01:13 7.7 0.57 89 PPM 233958 18:03:14.8 -10:51:43 9.0 0.22 89 5145 18:03:41.6 -10:40:25 13.0 89 Positions are for J2000
Event circumstances last updated at 2018/10/24 21:41:14 UT
Marc W. Buie, Southwest Research Institute