Event between (517717) 15KZ120 and star GA1220:04084240 with event index number of 267226
Geocentric closest approach at 2018/10/25 21:27:48 UTC
J2000 position of star is 17:04:25.1 +32:14:48
Equinox of date position of star is 17:05:07.5 +32:13:18
Stellar brightness G=15.1,
use SENSEUP=128
Star is 127 degrees from the moon.
Moon is 98% illuminated.
TNO apparent brightness V=19.7
TNO is 8.4 AU from the Sun
and 8.8 AU from the Earth.
The TNO is moving 24.5
km/sec on the sky relative to the star, or,
13.8 arcsec/hr.
The 1-sigma error in the time of the event is 14 seconds.
The 1-sigma cross-track error in the shadow position is
648 km.
The TNO has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 2.6 sec chord
Diameter=25.8 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
Star training set for 517717, (2018/10/25 21:28UT) Object RA Dec mag sep mel Vega 18:37:34.6 +38:48:08 0.0 19.87 109 27Bet Her 16:31:01.8 +21:26:59 2.8 13.17 140 59 Her 17:02:18.1 +33:32:31 5.3 1.45 126 PPM 079879 17:02:59.9 +31:51:30 7.4 0.58 128 PPM 079932 17:06:49.1 +32:09:33 9.3 0.36 127 PPM 079919 17:05:51.9 +31:59:54 10.3 0.27 127 517717 17:05:07.5 +32:13:18 15.1 127 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 517717, (2018/10/25 21:28UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 19.87 109 27Bet Her 16:30:13.1 +21:29:22 2.8 13.17 140 59 Her 17:01:36.4 +33:34:06 5.3 1.45 126 PPM 079879 17:02:17.2 +31:53:04 7.4 0.58 128 PPM 079932 17:06:06.6 +32:11:01 9.3 0.36 127 PPM 079919 17:05:09.3 +32:01:23 10.3 0.27 127 517717 17:04:25.1 +32:14:48 15.1 127 Positions are for J2000
Event circumstances last updated at 2018/10/23 20:41:18 UT
Marc W. Buie, Southwest Research Institute