Event between (15810) Arawn and star GA0720:33009486 with event index number of 1959665
Geocentric closest approach at 2028/08/24 02:56:16 UTC
J2000 position of star is 20:26:09.1 -17:51:46
Equinox of date position of star is 20:27:30.0 -17:47:02
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 101 degrees from the moon.
Moon is 19% illuminated.
Apparent brightness V=23.4
Object is 36.6 AU from the Sun
and 35.7 AU from the Earth.
Apparent velocity is 21.1
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 568 seconds.
The 1-sigma cross-track error in the shadow position is
5025 km.
The object has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 8.3 sec chord
Diameter=70.9 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is 3:2E
Star training set for 15810, (2028/08/24 03:01UT) Object RA Dec mag sep mel Fomalhaut 22:59:13.5 -29:28:10 1.2 36.42 125 38Zet Sgr 19:04:25.9 -29:50:12 2.7 22.50 80 10Pi Cap 20:28:57.4 -18:06:57 5.2 0.45 102 PPM 237438 20:28:09.3 -17:16:56 7.5 0.49 102 PPM 237445 20:28:39.3 -17:41:46 8.9 0.22 102 15810 20:27:47.0 -17:46:02 16.0 102 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, (2028/08/24 03:01UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.7 -29:37:24 1.2 36.42 125 38Zet Sgr 19:02:36.7 -29:52:49 2.7 22.50 80 10Pi Cap 20:27:19.2 -18:12:43 5.2 0.45 102 PPM 237438 20:26:31.7 -17:22:40 7.5 0.49 102 PPM 237445 20:27:01.4 -17:47:31 8.9 0.22 102 15810 20:26:09.1 -17:51:46 16.0 101 Positions are for J2000
Event circumstances last updated at 2023/09/04 01:03:59 UT
Marc W. Buie, Southwest Research Institute