Event between (437871) 01FN185 and star UC4-410-059964 with event index number of 119905
Geocentric closest approach at 2018/05/19 02:23:51 UTC
J2000 position of star is 14:48:34.0 -08:09:59
Equinox of date position of star is 14:49:31.4 -08:14:25
Stellar brightness R=14.1,
use SENSEUP=64
Star is 115 degrees from the moon.
Moon is 18% illuminated.
TNO apparent brightness V=23.2
TNO is 39.5 AU from the Sun
and 38.5 AU from the Earth.
The TNO is moving 23.8
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 362 seconds.
The 1-sigma cross-track error in the shadow position is
2265 km.
The TNO has an absolute magnitude Hv=7.2
Diameter=218.8 km assuming a 5% albedo -- 9.2 sec chord
Diameter=89.3 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is SCATEXTD
Star training set for 437871, (2018/05/19 02:24UT) Object RA Dec mag sep mel Spica 13:26:09.8 -11:15:24 1.0 20.76 96 27Bet Lib 15:17:59.9 -09:26:59 2.6 7.13 122 107Mu Vir 14:44:01.9 -05:44:14 3.9 2.85 113 PPM 197945 14:50:24.4 -08:34:48 7.4 0.40 115 PPM 197940 14:50:16.1 -08:27:01 9.3 0.27 115 437871 14:49:32.8 -08:14:32 14.1 115 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 437871, (2018/05/19 02:24UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 20.76 96 27Bet Lib 15:17:00.3 -09:22:59 2.6 7.13 122 107Mu Vir 14:43:03.8 -05:39:35 3.9 2.85 113 PPM 197945 14:49:25.4 -08:30:16 7.4 0.40 115 PPM 197940 14:49:17.1 -08:22:29 9.3 0.27 115 437871 14:48:34.0 -08:09:59 14.1 115 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:33:13 UT
Marc W. Buie, Southwest Research Institute