Event between (5145) Pholus and star UC4-403-073863 with event index number of 68834
Geocentric closest approach at 2017/07/27 00:09:29 UTC
J2000 position of star is 17:46:20.9 -09:29:36
Equinox of date position of star is 17:47:16.7 -09:29:55
Stellar brightness R=16.3
Star is 94 degrees from the moon.
Moon is 16% illuminated.
TNO apparent brightness V=21.6
TNO is 27.4 AU from the Sun
and 26.6 AU from the Earth.
The TNO is moving 20.2
km/sec on the sky relative to the star, or,
3.8 arcsec/hr.
The 1-sigma error in the time of the event is 176 seconds.
The 1-sigma cross-track error in the shadow position is
2172 km.
The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 11.3 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is CENTAURR
Star training set for 5145, (2017/07/27 00:09UT) Object RA Dec mag sep mel Antares 16:30:29.2 -26:28:10 0.9 24.86 79 35Eta Oph 17:11:23.2 -15:44:44 2.6 10.76 86 PPM 233705 17:54:02.1 -10:54:09 6.1 2.17 96 PPM 201003 17:46:05.8 -09:49:17 8.4 0.44 94 PPM 201044 17:48:02.5 -09:34:13 9.7 0.19 95 5145 17:47:18.8 -09:29:56 16.3 95 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, (2017/07/27 00:09UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:55 0.9 24.86 79 35Eta Oph 17:10:22.7 -15:43:29 2.6 10.76 86 PPM 233705 17:53:03.6 -10:53:59 6.1 2.17 96 PPM 201003 17:45:07.7 -09:48:55 8.4 0.44 94 PPM 201044 17:47:04.5 -09:33:54 9.7 0.19 95 5145 17:46:20.9 -09:29:36 16.3 94 Positions are for J2000
Event circumstances last updated at 2016/11/30 19:10:16 UT
Marc W. Buie, Southwest Research Institute