Event between (19521) Chaos and star GA1200:01929606 with event index number of 1008958
Geocentric closest approach at 2020/11/20 22:32:59 UTC
J2000 position of star is 05:47:44.9 +30:49:55
Equinox of date position of star is 05:49:04.2 +30:50:16
Stellar brightness G=16.7,
use SENSEUP=128
Star is 133 degrees from the moon.
Moon is 37% illuminated.
TNO apparent brightness V=26.2
TNO is 41.2 AU from the Sun
and 40.4 AU from the Earth.
The TNO is moving 22.0
km/sec on the sky relative to the star, or,
2.7 arcsec/hr.
The 1-sigma error in the time of the event is 448 seconds.
The 1-sigma cross-track error in the shadow position is
2702 km.
The TNO has an absolute magnitude Hv=10.0
Diameter=660.7 km assuming a 5% albedo -- 2.7 sec chord
Diameter=269.7 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CLASSICAL
Star training set for 19521, (2020/11/20 22:33UT) Object RA Dec mag sep mel Aldebaran 04:37:07.3 +16:32:59 0.8 21.75 115 Alnath 05:27:36.9 +28:37:23 1.6 5.16 128 PPM 070700 05:41:57.1 +31:22:04 5.9 1.62 132 PPM 070907 05:51:49.9 +31:04:10 8.3 0.63 134 PPM 070837 05:48:30.9 +30:39:44 9.4 0.22 133 19521 05:49:05.8 +30:50:16 16.7 133 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 19521, (2020/11/20 22:33UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 21.75 115 Alnath 05:26:17.5 +28:36:23 1.6 5.16 128 PPM 070700 05:40:35.9 +31:21:29 5.9 1.62 132 PPM 070907 05:50:28.9 +31:03:54 8.3 0.63 134 PPM 070837 05:47:10.2 +30:39:21 9.4 0.22 133 19521 05:47:44.9 +30:49:55 16.7 133 Positions are for J2000
Event circumstances last updated at 2020/06/22 20:14:00 UT
Marc W. Buie, Southwest Research Institute