Event between (131695) 01XS254 and star GA1060:03261563 with event index number of 2038442
Geocentric closest approach at 2022/02/21 16:15:48 UTC
J2000 position of star is 09:36:54.0 +17:34:36
Equinox of date position of star is 09:38:06.8 +17:28:39
Stellar brightness G=17.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 73 degrees from the moon.
Moon is 74% illuminated.
TNO apparent brightness V=23.2
TNO is 35.7 AU from the Sun
and 34.7 AU from the Earth.
The TNO is moving 24.5
km/sec on the sky relative to the star, or,
3.5 arcsec/hr.
The 1-sigma error in the time of the event is 112 seconds.
The 1-sigma cross-track error in the shadow position is
1713 km.
The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 7.1 sec chord
Diameter=70.9 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is CLASSICAL
Star training set for 131695, (2022/02/21 16:16UT) Object RA Dec mag sep mel Regulus 10:09:32.9 +11:51:29 1.3 9.45 64 PPM 126439 09:26:45.9 +16:29:20 6.3 2.89 75 PPM 126665 09:40:21.8 +17:22:01 8.4 0.54 73 PPM 126644 09:39:18.0 +17:15:15 8.8 0.36 73 PPM 126631 09:38:23.1 +17:44:04 10.1 0.27 73 131695 09:38:07.5 +17:28:35 17.0 73 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 131695, (2022/02/21 16:16UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 9.45 64 PPM 126439 09:25:32.4 +16:35:07 6.3 2.89 75 PPM 126665 09:39:08.3 +17:28:04 8.4 0.54 73 PPM 126644 09:38:04.6 +17:21:17 8.8 0.36 73 PPM 126631 09:37:09.5 +17:50:05 10.1 0.27 73 131695 09:36:54.0 +17:34:36 17.0 73 Positions are for J2000
Event circumstances last updated at 2021/12/04 02:04:11 UT
Marc W. Buie, Southwest Research Institute