Event between (469421) 01XD255 and star GA1140:03202659 with event index number of 2252192
Geocentric closest approach at 2025/11/27 03:14:34 UTC
J2000 position of star is 09:46:37.4 +24:04:42
Equinox of date position of star is 09:47:59.6 +23:57:57
Stellar brightness G=13.2,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 172 degrees from the moon.
Moon is 38% illuminated.
Apparent brightness V=21.7
Object is 37.9 AU from the Sun
and 37.7 AU from the Earth.
Apparent velocity is 7.0
km/sec on the sky relative to the star, or,
0.9 arcsec/hr.
The 1-sigma error in the time of the event is 202 seconds.
The 1-sigma cross-track error in the shadow position is
1797 km.
The object has an absolute magnitude Hv=5.8
Diameter=420.7 km assuming a 5% albedo -- 60.9 sec chord
Diameter=171.8 km assuming a 30% albedo -- 24.9 sec chord
Dynamical classification is 3:2E
Star training set for 469421, (2025/11/27 03:16UT) Object RA Dec mag sep mel Regulus 10:09:45.0 +11:50:23 1.3 13.16 171 17Eps Leo 09:47:19.0 +23:39:13 3.0 0.35 172 PPM 099854 09:48:50.0 +23:31:36 7.5 0.46 172 17Eps Leo 09:47:19.0 +23:39:13 3.0 0.35 172 PPM 099846 09:47:52.7 +23:49:25 10.4 0.14 172 469421 09:48:05.5 +23:57:28 13.2 172 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 469421, (2025/11/27 03:16UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 13.16 171 17Eps Leo 09:45:51.0 +23:46:27 3.0 0.35 172 PPM 099854 09:47:22.2 +23:38:52 7.5 0.46 172 17Eps Leo 09:45:51.0 +23:46:27 3.0 0.35 172 PPM 099846 09:46:24.7 +23:56:40 10.4 0.14 172 469421 09:46:37.4 +24:04:42 13.2 172 Positions are for J2000
Event circumstances last updated at 2024/03/04 05:37:01 UT
Marc W. Buie, Southwest Research Institute