Event between (535988) 15BU518 and star GA0720:05493043 with event index number of 2559627
Geocentric closest approach at 2025/04/02 05:59:57 UTC
J2000 position of star is 15:22:23.6 -16:24:41
Equinox of date position of star is 15:23:40.7 -16:29:30
Stellar brightness G=13.9,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 165 degrees from the moon.
Moon is 20% illuminated.
TNO apparent brightness V=22.8
TNO is 33.2 AU from the Sun
and 32.4 AU from the Earth.
The TNO is moving 16.9
km/sec on the sky relative to the star, or,
2.6 arcsec/hr.
The 1-sigma error in the time of the event is 180 seconds.
The 1-sigma cross-track error in the shadow position is
1985 km.
The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 11.3 sec chord
Diameter=77.8 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is SCATNEAR
Star training set for 535988, (2025/04/02 06:02UT) Object RA Dec mag sep mel Antares 16:30:57.6 -26:29:09 0.9 18.51 176 27Bet Lib 15:18:22.2 -09:28:28 2.6 7.15 159 32Zet1Lib 15:29:41.1 -16:48:10 5.6 1.44 166 PPM 230166 15:24:56.4 -16:39:09 7.6 0.31 165 PPM 230142 15:24:11.1 -16:25:15 9.8 0.12 165 535988 15:23:49.0 -16:30:01 13.9 165 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 535988, (2025/04/02 06:02UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 18.51 176 27Bet Lib 15:17:00.3 -09:22:59 2.6 7.15 159 32Zet1Lib 15:28:15.4 -16:43:00 5.6 1.44 166 PPM 230166 15:23:30.9 -16:33:51 7.6 0.31 165 PPM 230142 15:22:45.8 -16:19:55 9.8 0.12 165 535988 15:22:23.6 -16:24:41 13.9 165 Positions are for J2000
Event circumstances last updated at 2022/10/25 03:30:41 UT
Marc W. Buie, Southwest Research Institute