RECON: TNO occultation with 13KY18

Event between 13KY18 and star GA0660:22547259 with event index number of 2063135

Geocentric closest approach at 2022/04/13 12:58:43 UTC

J2000 position of star is 18:01:18.4 -23:55:24
Equinox of date position of star is 18:02:39.7 -23:55:20
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 108 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=21.6

TNO is 29.5 AU from the Sun and 29.1 AU from the Earth.
The TNO is moving 5.7 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 337 seconds.
The 1-sigma cross-track error in the shadow position is 1205 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=271.7 km assuming a 5% albedo -- 47.4 sec chord
Diameter=110.9 km assuming a 30% albedo -- 19.4 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 13KY18, (2022/04/13 13:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.6 -26:28:46  0.9 20.91  88
Nunki          18:56:38.7 -26:16:01  2.0 12.44 120
4 Sgr          18:01:09.2 -23:48:58  4.8  0.36 107
PPM 267704     18:03:12.3 -24:09:21  8.5  0.26 108
PPM 267681     18:02:40.0 -23:56:40  9.9  0.02 108
13KY18         18:02:40.1 -23:55:20 16.0       108
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, (2022/04/13 13:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.91  88
Nunki          18:55:15.9 -26:17:49  2.0 12.44 120
4 Sgr          17:59:47.6 -23:48:59  4.8  0.36 107
PPM 267704     18:01:50.5 -24:09:26  8.5  0.26 108
PPM 267681     18:01:18.3 -23:56:43  9.9  0.02 108
13KY18         18:01:18.4 -23:55:24 16.0       108
Positions are for J2000

Event circumstances last updated at 2022/03/12 01:35:41 UT

Marc W. Buie, Southwest Research Institute

RECON