Event between (523790) 15HP9 and star GA0700:06516354 with event index number of 1151969
Geocentric closest approach at 2021/04/09 21:13:57 UTC
J2000 position of star is 16:31:55.8 -18:46:10
Equinox of date position of star is 16:33:09.6 -18:48:47
Stellar brightness G=15.1,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 106 degrees from the moon.
Moon is 5% illuminated.
TNO apparent brightness V=22.5
TNO is 15.4 AU from the Sun
and 14.7 AU from the Earth.
The TNO is moving 11.3
km/sec on the sky relative to the star, or,
3.8 arcsec/hr.
The 1-sigma error in the time of the event is 177 seconds.
The 1-sigma cross-track error in the shadow position is
713 km.
The TNO has an absolute magnitude Hv=10.4
Diameter=50.1 km assuming a 5% albedo -- 4.5 sec chord
Diameter=20.5 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
Star training set for 523790, (2021/04/09 21:14UT) Object RA Dec mag sep mel Antares 16:30:42.9 -26:28:39 0.9 7.68 105 8Bet1Sco 16:06:40.6 -19:51:43 2.6 6.34 112 7Chi Oph 16:28:15.6 -18:30:10 4.1 1.20 108 PPM 231759 16:30:57.7 -18:43:39 8.1 0.53 107 PPM 231792 16:32:17.6 -18:39:56 9.8 0.25 107 523790 16:33:10.2 -18:48:48 15.1 106 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 523790, (2021/04/09 21:14UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 7.68 105 8Bet1Sco 16:05:26.2 -19:48:20 2.6 6.34 112 7Chi Oph 16:27:01.4 -18:27:23 4.1 1.20 108 PPM 231759 16:29:43.4 -18:40:56 8.1 0.53 107 PPM 231792 16:31:03.3 -18:37:16 9.8 0.25 107 523790 16:31:55.8 -18:46:10 15.1 106 Positions are for J2000
Event circumstances last updated at 2021/02/06 20:52:27 UT
Marc W. Buie, Southwest Research Institute