Event between 99GS46 and star TYC26176-00374-1 with event index number of 124748
Geocentric closest approach at 2017/04/29 19:42:34 UTC
J2000 position of star is 14:56:45.7 -18:57:23
Equinox of date position of star is 14:57:44.5 -19:01:31
Stellar brightness V=11.7,
use SENSEUP=8
Star is 141 degrees from the moon.
Moon is 16% illuminated.
TNO apparent brightness V=23.2
TNO is 45.3 AU from the Sun
and 44.3 AU from the Earth.
The TNO is moving 24.9
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 255 seconds.
The 1-sigma cross-track error in the shadow position is
4936 km.
The TNO has an absolute magnitude Hv=6.7
Diameter=276.7 km assuming a 5% albedo -- 11.1 sec chord
Diameter=113.0 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is CLASSICAL
Star training set for 99GS46, (2017/04/29 19:43UT) Object RA Dec mag sep mel Antares 16:30:28.3 -26:28:08 0.9 22.60 161 27Bet Lib 15:17:56.5 -09:26:45 2.6 10.75 143 PPM 229408 14:52:49.8 -18:25:33 6.2 1.31 139 PPM 229512 14:57:18.3 -18:59:51 8.0 0.11 140 PPM 229532 14:58:04.9 -18:59:17 9.8 0.09 141 99GS46 14:57:44.6 -19:01:32 11.7 141 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 99GS46, (2017/04/29 19:43UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:55 0.9 22.60 161 27Bet Lib 15:17:00.3 -09:22:59 2.6 10.75 143 PPM 229408 14:51:51.3 -18:21:19 6.2 1.31 139 PPM 229512 14:56:19.5 -18:55:42 8.0 0.11 140 PPM 229532 14:57:06.1 -18:55:09 9.8 0.09 141 99GS46 14:56:45.7 -18:57:23 11.7 140 Positions are for J2000
Event circumstances last updated at 2017/04/24 16:04:30 UT
Marc W. Buie, Southwest Research Institute