Event between (303712) 05PR21 and star GA0920:00021511 with event index number of 2297788
Geocentric closest approach at 2025/08/18 20:11:35 UTC
J2000 position of star is 00:13:50.1 +02:06:16
Equinox of date position of star is 00:14:57.4 +02:13:33
Stellar brightness G=14.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 87 degrees from the moon.
Moon is 22% illuminated.
TNO apparent brightness V=22.6
TNO is 42.4 AU from the Sun
and 41.6 AU from the Earth.
The TNO is moving 18.7
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 173 seconds.
The 1-sigma cross-track error in the shadow position is
2420 km.
The TNO has an absolute magnitude Hv=6.3
Diameter=323.6 km assuming a 5% albedo -- 17.3 sec chord
Diameter=132.1 km assuming a 30% albedo -- 7.1 sec chord
Dynamical classification is CLASSICAL
Star training set for 303712, (2025/08/18 20:14UT) Object RA Dec mag sep mel Fomalhaut 22:59:03.6 -29:29:08 1.2 36.58 117 Algenib 00:14:33.5 +15:19:33 2.8 13.08 81 44 Psc 00:26:43.1 +02:04:53 5.8 2.89 84 PPM 143221 00:11:59.6 +02:11:54 7.7 0.79 87 PPM 143287 00:15:53.4 +02:34:57 10.0 0.38 86 PPM 143286 00:15:52.8 +02:03:54 11.0 0.26 87 303712 00:15:09.0 +02:14:49 14.9 86 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, (2025/08/18 20:14UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.6 -29:37:24 1.2 36.58 117 Algenib 00:13:14.2 +15:11:01 2.8 13.08 81 44 Psc 00:25:24.2 +01:56:22 5.8 2.89 84 PPM 143221 00:10:40.7 +02:03:21 7.7 0.79 87 PPM 143287 00:14:34.5 +02:26:25 10.0 0.38 86 PPM 143286 00:14:33.9 +01:55:22 11.0 0.26 87 303712 00:13:50.1 +02:06:16 14.9 87 Positions are for J2000
Event circumstances last updated at 2021/11/12 00:37:13 UT
Marc W. Buie, Southwest Research Institute