RECON: TNO occultation with 13KY18

Event between 13KY18 and star GA0660:13478697 with event index number of 357563

Geocentric closest approach at 2019/05/22 18:51:02 UTC

J2000 position of star is 17:28:49.5 -22:58:10
Equinox of date position of star is 17:29:59.0 -22:59:01
Stellar brightness G=15.6, use SENSEUP=128
Star is 26 degrees from the moon. Moon is 84% illuminated.
TNO apparent brightness V=21.5

TNO is 29.9 AU from the Sun and 29.0 AU from the Earth.
The TNO is moving 21.8 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 176 seconds.
The 1-sigma cross-track error in the shadow position is 1300 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=272.9 km assuming a 5% albedo -- 12.5 sec chord
Diameter=111.4 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 13KY18, (2019/05/22 18:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.0 -26:28:24  0.9 13.92  39
35Eta Oph      17:11:29.5 -15:44:51  2.6  8.45  31
51 Oph         17:32:36.0 -23:58:34  4.8  1.16  25
PPM 266918     17:30:02.6 -23:27:23  8.4  0.47  25
PPM 266913     17:29:47.7 -23:15:26  9.9  0.28  25
13KY18         17:30:00.0 -22:59:02 15.6        25
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, (2019/05/22 18:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.92  39
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.45  31
51 Oph         17:31:25.0 -23:57:46  4.8  1.16  25
PPM 266918     17:28:51.9 -23:26:31  8.4  0.47  25
PPM 266913     17:28:37.0 -23:14:34  9.9  0.28  25
13KY18         17:28:49.5 -22:58:10 15.6        25
Positions are for J2000

Event circumstances last updated at 2019/02/12 08:03:41 UT

Marc W. Buie, Southwest Research Institute

RECON