RECON: TNO occultation with 13KY18

Event between 13KY18 and star GA0660:17076934 with event index number of 357784

Geocentric closest approach at 2020/04/24 03:25:34 UTC

J2000 position of star is 17:41:02.4 -23:20:08
Equinox of date position of star is 17:42:14.7 -23:20:39
Stellar brightness G=15.7, use SENSEUP=128
Star is 140 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.6

TNO is 29.8 AU from the Sun and 29.2 AU from the Earth.
The TNO is moving 12.6 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 494 seconds.
The 1-sigma cross-track error in the shadow position is 1902 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=272.9 km assuming a 5% albedo -- 21.6 sec chord
Diameter=111.4 km assuming a 30% albedo -- 8.8 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 13KY18, (2020/04/24 03:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.4 -26:28:31  0.9 16.52 155
35Eta Oph      17:11:32.7 -15:44:55  2.6 10.49 148
PPM 267109     17:39:58.2 -21:55:22  6.4  1.52 141
PPM 267163     17:43:34.3 -23:21:27  7.7  0.30 140
PPM 267144     17:42:22.5 -23:29:00  9.2  0.14 140
13KY18         17:42:16.6 -23:20:40 15.7       140
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 13KY18, (2020/04/24 03:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.52 155
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.49 148
PPM 267109     17:38:44.8 -21:54:46  6.4  1.52 141
PPM 267163     17:42:20.2 -23:20:56  7.7  0.30 140
PPM 267144     17:41:08.3 -23:28:28  9.2  0.14 140
13KY18         17:41:02.4 -23:20:08 15.7       140
Positions are for J2000

Event circumstances last updated at 2019/10/15 22:17:33 UT

Marc W. Buie, Southwest Research Institute

RECON