Event between (523955) 98UU43 and star GA1080:00775830 with event index number of 1590871
Geocentric closest approach at 2021/08/12 23:10:04 UTC
J2000 position of star is 05:00:21.3 +18:58:23
Equinox of date position of star is 05:01:35.4 +19:00:11
Stellar brightness G=9.7,
use SENSEUP=2 with the MallinCam and and exposure
time of 125 milli-seconds with the QHY174 camera.
Star is 120 degrees from the moon.
Moon is 22% illuminated.
TNO apparent brightness V=23.0
TNO is 34.7 AU from the Sun
and 35.2 AU from the Earth.
The TNO is moving 17.8
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 495 seconds.
The 1-sigma cross-track error in the shadow position is
1633 km.
The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 11.2 sec chord
Diameter=81.5 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 4:3E
Star training set for 523955, (2021/08/12 23:10UT) Object RA Dec mag sep mel Aldebaran 04:37:09.8 +16:33:04 0.8 6.32 126 Alnath 05:27:39.6 +28:37:25 1.6 11.31 112 104 Tau 05:08:43.7 +18:40:21 5.6 1.71 118 PPM 120566 05:06:05.7 +18:16:56 7.7 1.28 119 PPM 120516 05:03:02.1 +18:48:27 9.9 0.39 120 PPM 120485 05:01:37.4 +19:00:14 11.3 0.00 120 523955 05:01:37.4 +19:00:13 9.7 120 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 523955, (2021/08/12 23:10UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 6.32 126 Alnath 05:26:17.5 +28:36:23 1.6 11.31 112 104 Tau 05:07:27.8 +18:38:43 5.6 1.71 118 PPM 120566 05:04:50.0 +18:15:14 7.7 1.28 119 PPM 120516 05:01:46.2 +18:46:39 9.9 0.39 120 PPM 120485 05:00:21.3 +18:58:23 11.3 0.00 120 523955 05:00:21.3 +18:58:23 9.7 120 Positions are for J2000
Event circumstances last updated at 2021/01/24 20:59:27 UT
Marc W. Buie, Southwest Research Institute