Event between (418993) 09MS9 and star GA0800:00308957 with event index number of 2217302
Geocentric closest approach at 2021/10/09 23:38:49 UTC
J2000 position of star is 03:54:19.9 -08:36:36
Equinox of date position of star is 03:55:22.9 -08:32:51
Stellar brightness G=15.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon.
Moon is 17% illuminated.
TNO apparent brightness V=22.6
TNO is 18.7 AU from the Sun
and 18.0 AU from the Earth.
The TNO is moving 25.7
km/sec on the sky relative to the star, or,
7.1 arcsec/hr.
The 1-sigma error in the time of the event is 38 seconds.
The 1-sigma cross-track error in the shadow position is
873 km.
The TNO has an absolute magnitude Hv=9.7
Diameter=67.9 km assuming a 5% albedo -- 2.6 sec chord
Diameter=27.7 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURS
Star training set for 418993, (2021/10/09 23:39UT) Object RA Dec mag sep mel Rigel 05:15:35.1 -08:10:41 0.1 19.84 147 Menkar 03:03:25.2 +04:10:26 2.5 18.16 156 23Del Eri 03:44:17.6 -09:41:28 3.5 2.97 148 PPM 186278 03:53:40.6 -08:25:42 8.4 0.44 150 PPM 186325 03:55:44.6 -08:37:37 9.6 0.12 150 418993 03:55:23.1 -08:32:50 15.4 150 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 418993, (2021/10/09 23:39UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 19.84 147 Menkar 03:02:16.8 +04:05:21 2.5 18.16 156 23Del Eri 03:43:14.8 -09:45:32 3.5 2.97 148 PPM 186278 03:52:37.3 -08:29:31 8.4 0.44 150 PPM 186325 03:54:41.5 -08:41:23 9.6 0.12 150 418993 03:54:19.9 -08:36:36 15.4 150 Positions are for J2000
Event circumstances last updated at 2021/09/12 01:25:58 UT
Marc W. Buie, Southwest Research Institute