Event between (86047) 99OY3 and star GA0900:16332784 with event index number of 1748348
Geocentric closest approach at 2021/04/28 00:27:02 UTC
J2000 position of star is 22:01:39.9 +01:15:19
Equinox of date position of star is 22:02:44.3 +01:21:27
Stellar brightness G=14.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 102 degrees from the moon.
Moon is 99% illuminated.
TNO apparent brightness V=23.2
TNO is 42.2 AU from the Sun
and 42.7 AU from the Earth.
The TNO is moving 18.8
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 164 seconds.
The 1-sigma cross-track error in the shadow position is
2936 km.
The TNO has an absolute magnitude Hv=6.8
Diameter=264.2 km assuming a 5% albedo -- 14.0 sec chord
Diameter=107.9 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is SCATEXTD
Star training set for 86047, (2021/04/28 00:27UT) Object RA Dec mag sep mel Fomalhaut 22:58:49.5 -29:30:32 1.2 33.65 103 Markab 23:05:49.5 +15:19:13 2.5 20.90 120 34Alp Aqr 22:06:52.7 -00:12:56 3.0 1.88 102 PPM 172528 22:01:06.5 +01:01:53 8.5 0.53 101 PPM 172542 22:01:35.2 +01:25:29 9.8 0.30 102 PPM 172573 22:03:14.8 +01:30:09 10.5 0.19 102 86047 22:02:45.1 +01:21:32 14.4 102 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 86047, (2021/04/28 00:27UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.6 -29:37:24 1.2 33.65 103 Markab 23:04:45.8 +15:12:18 2.5 20.90 120 34Alp Aqr 22:05:47.1 -00:19:12 3.0 1.88 102 PPM 172528 22:00:01.2 +00:55:42 8.5 0.53 101 PPM 172542 22:00:30.0 +01:19:18 9.8 0.30 102 PPM 172573 22:02:09.5 +01:23:56 10.5 0.19 102 86047 22:01:39.9 +01:15:19 14.4 102 Positions are for J2000
Event circumstances last updated at 2021/01/20 21:01:31 UT
Marc W. Buie, Southwest Research Institute