Event between (455171) 99OM4 and star GA0800:21789869 with event index number of 131484
Geocentric closest approach at 2018/07/28 01:18:05 UTC
J2000 position of star is 22:48:19.3 -09:14:07
Equinox of date position of star is 22:49:17.2 -09:08:15
Stellar brightness G=13.7,
use SENSEUP=64
Star is 33 degrees from the moon.
Moon is 100% illuminated.
TNO apparent brightness V=23.7
TNO is 45.6 AU from the Sun
and 44.8 AU from the Earth.
The TNO is moving 19.7
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 352 seconds.
The 1-sigma cross-track error in the shadow position is
3419 km.
The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 11.7 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 455171, (2018/07/28 01:18UT) Object RA Dec mag sep mel Fomalhaut 22:58:40.4 -29:31:24 1.2 20.50 33 70 Aqr 22:49:28.8 -10:27:25 6.2 1.32 32 PPM 206751 22:47:17.6 -09:36:03 8.5 0.68 32 PPM 206797 22:49:25.0 -08:57:43 9.7 0.18 33 455171 22:49:17.6 -09:08:13 13.7 33 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 455171, (2018/07/28 01:18UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.5 -29:37:23 1.2 20.50 33 70 Aqr 22:48:30.3 -10:33:20 6.2 1.32 32 PPM 206751 22:46:19.2 -09:41:57 8.5 0.68 32 PPM 206797 22:48:26.7 -09:03:37 9.7 0.18 33 455171 22:48:19.3 -09:14:07 13.7 33 Positions are for J2000
Event circumstances last updated at 2018/06/05 16:17:15 UT
Marc W. Buie, Southwest Research Institute