Event between (303712) 05PR21 and star GA0920:00028749 with event index number of 2297797
Geocentric closest approach at 2026/08/21 21:44:38 UTC
J2000 position of star is 00:18:34.2 +02:38:51
Equinox of date position of star is 00:19:42.1 +02:46:11
Stellar brightness G=13.8,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 107 degrees from the moon.
Moon is 67% illuminated.
TNO apparent brightness V=22.6
TNO is 42.5 AU from the Sun
and 41.7 AU from the Earth.
The TNO is moving 19.2
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 191 seconds.
The 1-sigma cross-track error in the shadow position is
2639 km.
The TNO has an absolute magnitude Hv=6.3
Diameter=323.6 km assuming a 5% albedo -- 16.9 sec chord
Diameter=132.1 km assuming a 30% albedo -- 6.9 sec chord
Dynamical classification is CLASSICAL
Star training set for 303712, (2026/08/21 21:47UT) Object RA Dec mag sep mel Fomalhaut 22:59:06.9 -29:28:49 1.2 37.63 75 Algenib 00:14:36.7 +15:19:53 2.8 12.60 111 44 Psc 00:26:46.3 +02:05:13 5.8 1.85 108 PPM 143346 00:19:09.8 +01:50:12 7.0 0.98 106 PPM 143333 00:18:41.0 +02:37:29 9.7 0.36 106 PPM 143366 00:20:12.1 +02:27:21 10.4 0.35 107 303712 00:19:56.3 +02:47:43 13.8 107 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 303712, (2026/08/21 21:47UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.6 -29:37:24 1.2 37.63 75 Algenib 00:13:14.2 +15:11:01 2.8 12.60 111 44 Psc 00:25:24.2 +01:56:22 5.8 1.85 108 PPM 143346 00:17:47.8 +01:41:20 7.0 0.98 106 PPM 143333 00:17:19.0 +02:28:37 9.7 0.36 106 PPM 143366 00:18:50.1 +02:18:29 10.4 0.35 107 303712 00:18:34.2 +02:38:51 13.8 107 Positions are for J2000
Event circumstances last updated at 2022/01/16 00:44:05 UT
Marc W. Buie, Southwest Research Institute