Event between 12DR30 and star UC4-144-030399 with event index number of 94090
Geocentric closest approach at 2017/12/20 15:47:41 UTC
J2000 position of star is 09:54:39.5 -61:17:46
Equinox of date position of star is 09:55:11.9 -61:22:53
Stellar brightness R=16.3,
use SENSEUP=128
Star is 95 degrees from the moon.
Moon is 5% illuminated.
TNO apparent brightness V=20.0
TNO is 18.1 AU from the Sun
and 18.2 AU from the Earth.
The TNO is moving 36.2
km/sec on the sky relative to the star, or,
9.8 arcsec/hr.
The 1-sigma error in the time of the event is 76 seconds.
The 1-sigma cross-track error in the shadow position is
3091 km.
The TNO has an absolute magnitude Hv=7.1
Diameter=227.0 km assuming a 5% albedo -- 6.3 sec chord
Diameter=92.7 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is CENTAURS
Star training set for 12DR30, (2017/12/20 15:48UT) Object RA Dec mag sep mel Bet Cru 12:48:47.0 -59:47:12 1.3 20.98 80 Iot Car 09:17:34.2 -59:21:04 2.3 5.07 99 PPM 357723 10:03:22.4 -62:14:38 6.3 1.29 94 PPM 357648 09:55:30.7 -60:43:35 7.8 0.66 96 PPM 357663 09:57:40.1 -61:23:40 9.5 0.30 95 12DR30 09:55:12.0 -61:22:54 16.3 95 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 12DR30, (2017/12/20 15:48UT) Object RA Dec mag sep mel Bet Cru 12:47:43.1 -59:41:20 1.3 20.98 80 Iot Car 09:17:05.4 -59:16:31 2.3 5.07 99 PPM 357723 10:02:49.3 -62:09:24 6.3 1.29 94 PPM 357648 09:54:57.6 -60:38:27 7.8 0.66 96 PPM 357663 09:57:07.3 -61:18:30 9.5 0.30 95 12DR30 09:54:39.5 -61:17:46 16.3 95 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:06:55 UT
Marc W. Buie, Southwest Research Institute