Event between 01SD291 and star UC4-496-002708 with event index number of 120749
Geocentric closest approach at 2017/11/22 22:57:38 UTC
J2000 position of star is 01:53:42.1 +09:04:49
Equinox of date position of star is 01:54:38.0 +09:09:58
Stellar brightness R=16.4,
use SENSEUP=128
Star is 100 degrees from the moon.
Moon is 17% illuminated.
TNO apparent brightness V=24.5
TNO is 42.1 AU from the Sun
and 41.2 AU from the Earth.
The TNO is moving 20.9
km/sec on the sky relative to the star, or,
2.5 arcsec/hr.
The 1-sigma error in the time of the event is 71 seconds.
The 1-sigma cross-track error in the shadow position is
1495 km.
The TNO has an absolute magnitude Hv=8.2
Diameter=138.7 km assuming a 5% albedo -- 6.6 sec chord
Diameter=56.6 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CLASSICAL
Star training set for 01SD291, (2017/11/22 22:58UT) Object RA Dec mag sep mel Aldebaran 04:36:57.0 +16:32:38 0.8 40.17 140 6Bet Ari 01:55:37.9 +20:53:41 2.6 11.73 104 110Omi Psc 01:46:20.5 +09:14:50 4.3 2.05 98 PPM 145136 01:57:19.3 +08:35:45 8.3 0.87 101 PPM 145063 01:53:13.8 +08:55:06 9.3 0.43 100 PPM 145089 01:54:25.8 +09:20:41 10.2 0.19 100 01SD291 01:54:39.0 +09:10:04 16.4 100 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 01SD291, (2017/11/22 22:58UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 40.17 140 6Bet Ari 01:54:38.5 +20:48:27 2.6 11.73 104 110Omi Psc 01:45:23.7 +09:09:29 4.3 2.05 98 PPM 145136 01:56:22.5 +08:30:32 8.3 0.87 101 PPM 145063 01:52:17.0 +08:49:50 9.3 0.43 100 PPM 145089 01:53:28.9 +09:15:26 10.2 0.19 100 01SD291 01:53:42.1 +09:04:49 16.4 100 Positions are for J2000
Event circumstances last updated at 2017/07/27 16:03:49 UT
Marc W. Buie, Southwest Research Institute