Event between 11UB411 and star GA1140:00336788 with event index number of 1698119
Geocentric closest approach at 2021/07/31 22:38:23 UTC
J2000 position of star is 02:44:15.6 +24:05:10
Equinox of date position of star is 02:45:28.7 +24:10:27
Stellar brightness G=15.2,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 10 degrees from the moon.
Moon is 46% illuminated.
TNO apparent brightness V=24.2
TNO is 38.9 AU from the Sun
and 39.0 AU from the Earth.
The TNO is moving 9.6
km/sec on the sky relative to the star, or,
1.2 arcsec/hr.
The 1-sigma error in the time of the event is 337 seconds.
The 1-sigma cross-track error in the shadow position is
4792 km.
The TNO has an absolute magnitude Hv=8.1
Diameter=145.2 km assuming a 5% albedo -- 15.1 sec chord
Diameter=59.3 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is SCATNEAR
Star training set for 11UB411, (2021/07/31 22:38UT) Object RA Dec mag sep mel Aldebaran 04:37:09.7 +16:33:03 0.8 27.20 27 Hamal 02:08:23.7 +23:33:49 2.0 8.51 13 PPM 091996 02:50:01.5 +25:16:37 5.9 1.50 12 PPM 091944 02:46:00.1 +24:16:28 8.2 0.15 11 11UB411 02:45:30.5 +24:10:35 15.2 11 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 11UB411, (2021/07/31 22:38UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 27.20 27 Hamal 02:07:10.7 +23:27:42 2.0 8.51 13 PPM 091996 02:48:46.0 +25:11:17 5.9 1.50 12 PPM 091944 02:44:45.2 +24:11:03 8.2 0.15 11 11UB411 02:44:15.6 +24:05:10 15.2 10 Positions are for J2000
Event circumstances last updated at 2021/01/24 20:46:39 UT
Marc W. Buie, Southwest Research Institute