RECON: TNO occultation with 119979

Event between (119979) 02WC19 and star UC4-550-020411 with event index number of 164968

Geocentric closest approach at 2018/12/03 17:11:58 UTC

J2000 position of star is 05:53:17.8 +19:55:30
Equinox of date position of star is 05:54:18.1 +19:55:39
Stellar brightness R=16.1
Star is 120 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=21.0

TNO is 40.4 AU from the Sun and 39.4 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 639 seconds.
The 1-sigma cross-track error in the shadow position is 2926 km.

The TNO has an absolute magnitude Hv=4.9
Diameter=631.0 km assuming a 5% albedo -- 26.2 sec chord
Diameter=257.6 km assuming a 30% albedo -- 10.7 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 
 
 

Star training set for 119979, (2018/12/03 17:12UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.8 +07:24:33  0.4 12.53 120
Alnath         05:27:29.4 +28:37:18  1.6 10.64 125
PPM 121513     05:53:30.7 +19:52:16  6.4  0.22 120
119979         05:54:25.1 +19:55:40 16.1       120
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 119979, (2018/12/03 17:12UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 12.53 120
Alnath         05:26:17.5 +28:36:24  1.6 10.64 125
PPM 121513     05:52:23.4 +19:52:04  6.4  0.22 120
119979         05:53:17.8 +19:55:30 16.1       120
Positions are for J2000

Event circumstances last updated at 2016/12/12 17:39:19 UT

Marc W. Buie, Southwest Research Institute

RECON