RECON: TNO occultation with 14HT199

Event between 14HT199 and star GDR2_231.962_-13.821 with event index number of 256123

Geocentric closest approach at 2018/07/06 18:59:12 UTC

J2000 position of star is 15:27:50.8 -13:49:16
Equinox of date position of star is 15:28:52.2 -13:53:02
Stellar brightness G=12.0, use SENSEUP=16
Star is 147 degrees from the moon. Moon is 45% illuminated.
TNO apparent brightness V=22.1

TNO is 30.0 AU from the Sun and 29.3 AU from the Earth.
The TNO is moving 12.9 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 349 seconds.
The 1-sigma cross-track error in the shadow position is 3023 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=213.8 km assuming a 5% albedo -- 16.6 sec chord
Diameter=87.3 km assuming a 30% albedo -- 6.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 14HT199, (2018/07/06 18:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.7 -26:28:18  0.9 19.14 130
27Bet Lib      15:18:00.3 -09:27:00  2.6  5.17 151
38Gam Lib      15:36:33.9 -14:51:00  3.9  2.10 145
PPM 230184     15:25:06.8 -14:22:30  7.8  1.04 148
PPM 230290     15:29:30.6 -13:57:06  9.4  0.17 147
14HT199        15:28:52.6 -13:53:04 12.0       147
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 14HT199, (2018/07/06 18:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.14 130
27Bet Lib      15:17:00.3 -09:22:59  2.6  5.17 151
38Gam Lib      15:35:31.7 -14:47:22  3.9  2.10 145
PPM 230184     15:24:05.0 -14:18:37  7.8  1.04 148
PPM 230290     15:28:28.8 -13:53:18  9.4  0.17 147
14HT199        15:27:50.8 -13:49:16 12.0       147
Positions are for J2000

Event circumstances last updated at 2018/05/24 17:51:22 UT

Marc W. Buie, Southwest Research Institute

RECON