Event between (38628) Huya and star UC4-422-064677 with event index number of 68562
Geocentric closest approach at 2017/04/28 00:40:46 UTC
J2000 position of star is 16:17:08.9 -05:46:33
Equinox of date position of star is 16:18:02.5 -05:48:58
Stellar brightness R=16.4
Star is 169 degrees from the moon.
Moon is 4% illuminated.
TNO apparent brightness V=19.5
TNO is 28.6 AU from the Sun
and 27.7 AU from the Earth.
The TNO is moving 20.6
km/sec on the sky relative to the star, or,
3.7 arcsec/hr.
The 1-sigma error in the time of the event is 79 seconds.
The 1-sigma cross-track error in the shadow position is
1099 km.
The TNO has an absolute magnitude Hv=4.9
Diameter=631.0 km assuming a 5% albedo -- 30.7 sec chord
Diameter=257.6 km assuming a 30% albedo -- 12.5 sec chord
Dynamical classification is 3:2E+6:4II
Star training set for 38628, (2017/04/28 00:41UT) Object RA Dec mag sep mel Antares 16:30:28.3 -26:28:08 0.9 20.86 166 1Del Oph 16:15:15.3 -03:44:16 2.7 2.19 167 2Eps Oph 16:19:14.4 -04:44:01 3.2 1.12 168 PPM 199481 16:17:43.5 -05:32:19 7.7 0.29 169 PPM 199489 16:18:18.7 -05:38:20 9.6 0.19 169 38628 16:18:04.3 -05:49:03 16.4 169 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 38628, (2017/04/28 00:41UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:55 0.9 20.86 166 1Del Oph 16:14:20.7 -03:41:42 2.7 2.19 167 2Eps Oph 16:18:19.4 -04:41:32 3.2 1.12 168 PPM 199481 16:16:48.3 -05:29:49 7.7 0.29 169 PPM 199489 16:17:23.4 -05:35:50 9.6 0.19 169 38628 16:17:08.9 -05:46:33 16.4 169 Positions are for J2000
Event circumstances last updated at 2016/10/07 18:06:55 UT
Marc W. Buie, Southwest Research Institute