Event between (15810) Arawn and star GA0700:33978031 with event index number of 1497617
Geocentric closest approach at 2025/07/20 21:18:16 UTC
J2000 position of star is 20:07:33.9 -18:31:56
Equinox of date position of star is 20:08:55.6 -18:27:44
Stellar brightness G=15.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 126 degrees from the moon.
Moon is 19% illuminated.
Apparent brightness V=23.2
Object is 36.3 AU from the Sun
and 35.2 AU from the Earth.
Apparent velocity is 24.2
km/sec on the sky relative to the star, or,
3.4 arcsec/hr.
The 1-sigma error in the time of the event is 334 seconds.
The 1-sigma cross-track error in the shadow position is
2885 km.
The object has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 7.2 sec chord
Diameter=70.9 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is 3:2E
Star training set for 15810, (2025/07/20 21:24UT) Object RA Dec mag sep mel Fomalhaut 22:59:03.3 -29:29:10 1.2 40.13 94 Nunki 18:56:50.9 -26:15:45 2.0 18.40 144 7Sig Cap 20:20:51.9 -19:02:13 5.3 2.86 124 PPM 236986 20:09:41.4 -18:43:41 7.4 0.31 126 15810 20:09:02.1 -18:27:24 15.9 126 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 15810, (2025/07/20 21:24UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.6 -29:37:24 1.2 40.13 94 Nunki 18:55:15.9 -26:17:49 2.0 18.40 144 7Sig Cap 20:19:23.6 -19:07:07 5.3 2.86 124 PPM 236986 20:08:13.0 -18:48:14 7.4 0.31 126 15810 20:07:33.9 -18:31:56 15.9 126 Positions are for J2000
Event circumstances last updated at 2023/09/03 03:23:32 UT
Marc W. Buie, Southwest Research Institute