Event between (5145) Pholus and star UC4-400-074721 with event index number of 119314
Geocentric closest approach at 2018/05/18 14:08:23 UTC
J2000 position of star is 18:01:30.9 -10:02:34
Equinox of date position of star is 18:02:31.6 -10:02:30
Stellar brightness R=15.3,
use SENSEUP=128
Star is 166 degrees from the moon.
Moon is 13% illuminated.
TNO apparent brightness V=21.6
TNO is 27.8 AU from the Sun
and 27.0 AU from the Earth.
The TNO is moving 21.0
km/sec on the sky relative to the star, or,
3.9 arcsec/hr.
The 1-sigma error in the time of the event is 187 seconds.
The 1-sigma cross-track error in the shadow position is
1835 km.
The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 10.9 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is CENTAURR
Star training set for 5145, (2018/05/18 14:08UT) Object RA Dec mag sep mel Antares 16:30:32.2 -26:28:17 0.9 27.24 149 35Eta Oph 17:11:26.0 -15:44:47 2.6 13.69 158 64Nu Oph 18:00:02.3 -09:46:28 3.3 0.67 165 PPM 201352 18:04:55.0 -09:15:04 8.3 0.99 165 PPM 233904 18:01:56.1 -10:11:52 9.4 0.21 166 5145 18:02:31.7 -10:02:30 15.3 166 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, (2018/05/18 14:08UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 27.24 149 35Eta Oph 17:10:22.7 -15:43:29 2.6 13.69 158 64Nu Oph 17:59:01.6 -09:46:27 3.3 0.67 165 PPM 201352 18:03:54.5 -09:15:11 8.3 0.99 165 PPM 233904 18:00:55.2 -10:11:54 9.4 0.21 166 5145 18:01:30.9 -10:02:34 15.3 165 Positions are for J2000
Event circumstances last updated at 2018/05/08 16:40:09 UT
Marc W. Buie, Southwest Research Institute