Event between (5145) Pholus and star GA0760:13124542 with event index number of 1056790
Geocentric closest approach at 2021/02/23 20:34:46 UTC
J2000 position of star is 18:21:21.2 -12:13:39
Equinox of date position of star is 18:22:31.8 -12:12:59
Stellar brightness G=12.5,
use SENSEUP=16 with the MallinCam and and exposure
time of 250 milli-seconds with the QHY174 camera.
Star is 159 degrees from the moon.
Moon is 86% illuminated.
TNO apparent brightness V=21.9
TNO is 28.9 AU from the Sun
and 29.4 AU from the Earth.
The TNO is moving 19.2
km/sec on the sky relative to the star, or,
3.2 arcsec/hr.
The 1-sigma error in the time of the event is 55 seconds.
The 1-sigma cross-track error in the shadow position is
1067 km.
The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 11.9 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is CENTAURR
Star training set for 5145, (2021/02/23 20:35UT) Object RA Dec mag sep mel Antares 16:30:42.4 -26:28:38 0.9 29.88 138 Nunki 18:56:34.5 -26:16:07 2.0 16.17 171 PPM 234462 18:24:23.2 -12:00:10 6.3 0.50 159 PPM 234431 18:23:00.7 -11:54:41 8.2 0.33 159 PPM 234426 18:22:51.6 -12:23:37 9.7 0.19 159 5145 18:22:32.4 -12:12:59 12.5 159 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, (2021/02/23 20:35UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 29.88 138 Nunki 18:55:15.9 -26:17:49 2.0 16.17 171 PPM 234462 18:23:12.2 -12:00:54 6.3 0.50 159 PPM 234431 18:21:49.8 -11:55:23 8.2 0.33 159 PPM 234426 18:21:40.4 -12:24:18 9.7 0.19 159 5145 18:21:21.2 -12:13:39 12.5 159 Positions are for J2000
Event circumstances last updated at 2020/12/22 00:07:25 UT
Marc W. Buie, Southwest Research Institute