Event between (55638) 02VE95 and star UC4-490-017448 with event index number of 85939
Geocentric closest approach at 2017/10/22 20:39:06 UTC
J2000 position of star is 06:01:20.8 +07:54:16
Equinox of date position of star is 06:02:17.4 +07:54:13
Stellar brightness R=15.0,
use SENSEUP=128
Star is 152 degrees from the moon.
Moon is 9% illuminated.
TNO apparent brightness V=20.4
TNO is 29.7 AU from the Sun
and 29.2 AU from the Earth.
The TNO is moving 11.7
km/sec on the sky relative to the star, or,
2.0 arcsec/hr.
The 1-sigma error in the time of the event is 132 seconds.
The 1-sigma cross-track error in the shadow position is
1345 km.
The TNO has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 40.8 sec chord
Diameter=195.4 km assuming a 30% albedo -- 16.7 sec chord
Dynamical classification is 3:2E
Star training set for 55638, (2017/10/22 20:39UT) Object RA Dec mag sep mel Betelgeuse 05:56:08.2 +07:24:32 0.4 1.61 154 Bellatrix 05:26:05.2 +06:21:52 1.6 9.12 160 PPM 149639 05:55:52.6 +05:51:46 6.4 2.59 153 PPM 149810 06:03:33.7 +07:41:50 7.7 0.37 152 PPM 149814 06:03:39.6 +08:00:59 8.7 0.35 152 PPM 149780 06:02:19.7 +07:51:13 10.1 0.05 152 55638 06:02:18.8 +07:54:13 15.0 152 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 55638, (2017/10/22 20:39UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 1.61 154 Bellatrix 05:25:07.8 +06:20:58 1.6 9.12 160 PPM 149639 05:54:55.4 +05:51:39 6.4 2.59 153 PPM 149810 06:02:35.7 +07:41:55 7.7 0.37 152 PPM 149814 06:02:41.5 +08:01:04 8.7 0.35 152 PPM 149780 06:01:21.6 +07:51:15 10.1 0.05 152 55638 06:01:20.8 +07:54:16 15.0 152 Positions are for J2000
Event circumstances last updated at 2017/05/16 18:35:05 UT
Marc W. Buie, Southwest Research Institute