Event between (525815) 05SD278 and star GA0940:00516412 with event index number of 2116799
Geocentric closest approach at 2025/10/07 00:43:20 UTC
J2000 position of star is 04:52:06.7 +04:31:17
Equinox of date position of star is 04:53:22.5 +04:33:36
Stellar brightness G=15.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 62 degrees from the moon.
Moon is 100% illuminated.
Apparent brightness V=22.9
Object is 44.8 AU from the Sun
and 44.2 AU from the Earth.
Apparent velocity is 13.5
km/sec on the sky relative to the star, or,
1.5 arcsec/hr.
The 1-sigma error in the time of the event is 247 seconds.
The 1-sigma cross-track error in the shadow position is
2695 km.
The object has an absolute magnitude Hv=6.3
Diameter=346.7 km assuming a 5% albedo -- 24.7 sec chord
Diameter=141.6 km assuming a 30% albedo -- 10.1 sec chord
Dynamical classification is SCATNEAR
Star training set for 525815, (2025/10/07 00:43UT) Object RA Dec mag sep mel Aldebaran 04:37:24.1 +16:33:33 0.8 12.63 58 Bellatrix 05:26:30.9 +06:22:15 1.6 8.42 70 3Pi 4Ori 04:52:34.8 +05:38:50 3.7 1.11 62 PPM 148046 04:52:01.9 +04:20:10 8.0 0.43 62 PPM 148084 04:53:17.2 +04:33:45 9.0 0.05 62 525815 04:53:28.5 +04:33:47 15.7 63 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 525815, (2025/10/07 00:43UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 12.63 58 Bellatrix 05:25:07.8 +06:20:58 1.6 8.42 70 3Pi 4Ori 04:51:12.4 +05:36:18 3.7 1.11 62 PPM 148046 04:50:40.2 +04:17:37 8.0 0.43 62 PPM 148084 04:51:55.3 +04:31:16 9.0 0.05 62 525815 04:52:06.7 +04:31:17 15.7 62 Positions are for J2000
Event circumstances last updated at 2023/11/14 03:54:33 UT
Marc W. Buie, Southwest Research Institute