Event between 12DR30 and star UC4-097-019040 with event index number of 229757
Geocentric closest approach at 2019/12/12 14:55:08 UTC
J2000 position of star is 09:19:25.3 -70:37:35
Equinox of date position of star is 09:19:37.4 -70:42:32
Stellar brightness R=16.5,
use SENSEUP=128
Star is 100 degrees from the moon.
Moon is 100% illuminated.
TNO apparent brightness V=20.4
TNO is 20.1 AU from the Sun
and 20.3 AU from the Earth.
The TNO is moving 37.4
km/sec on the sky relative to the star, or,
9.2 arcsec/hr.
The 1-sigma error in the time of the event is 143 seconds.
The 1-sigma cross-track error in the shadow position is
3533 km.
The TNO has an absolute magnitude Hv=7.1
Diameter=227.0 km assuming a 5% albedo -- 6.1 sec chord
Diameter=92.7 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURS
Star training set for 12DR30, (2019/12/12 14:55UT) Object RA Dec mag sep mel Bet Cru 12:48:54.0 -59:47:51 1.3 23.46 118 Bet Car 09:13:24.6 -69:47:58 1.7 1.05 99 PPM 370201 09:05:47.6 -70:37:09 4.7 1.15 99 PPM 370273 09:20:01.9 -71:05:40 8.2 0.38 101 PPM 370259 09:17:34.5 -70:46:05 9.7 0.18 100 12DR30 09:19:37.7 -70:42:40 16.5 100 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, (2019/12/12 14:55UT) Object RA Dec mag sep mel Bet Cru 12:47:43.1 -59:41:20 1.3 23.46 118 Bet Car 09:13:11.3 -69:43:00 1.7 1.05 99 PPM 370201 09:05:38.4 -70:32:19 4.7 1.15 99 PPM 370273 09:19:50.5 -71:00:34 8.2 0.38 101 PPM 370259 09:17:22.8 -70:41:01 9.7 0.18 100 12DR30 09:19:25.3 -70:37:35 16.5 100 Positions are for J2000
Event circumstances last updated at 2019/06/07 22:59:47 UT
Marc W. Buie, Southwest Research Institute