RECON: TNO occultation with 120348

Event between (120348) 04TY364 and star UC4-407-003678 with event index number of 170316

Geocentric closest approach at 2018/12/11 10:00:01 UTC

J2000 position of star is 03:05:32.2 -08:44:46
Equinox of date position of star is 03:06:22.0 -08:40:51
Stellar brightness R=15.9, use SENSEUP=128
Star is 95 degrees from the moon. Moon is 15% illuminated.
TNO apparent brightness V=20.4

TNO is 38.9 AU from the Sun and 38.2 AU from the Earth.
The TNO is moving 20.5 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 119 seconds.
The 1-sigma cross-track error in the shadow position is 1535 km.

The TNO has an absolute magnitude Hv=4.4
Diameter=794.4 km assuming a 5% albedo -- 38.8 sec chord
Diameter=324.3 km assuming a 30% albedo -- 15.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 120348, (2018/12/11 10:00UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:26.9 -08:10:52  0.1 31.89 124
68Omi Cet      02:20:18.3 -02:53:33  2.0 12.85  86
10Rho3Eri      03:05:12.4 -07:31:40  5.7  1.19  95
PPM 185396     03:07:23.7 -08:31:04  8.5  0.28  95
PPM 185375     03:06:20.9 -08:46:35  9.5  0.11  95
120348         03:06:27.6 -08:40:24 15.9        95
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 120348, (2018/12/11 10:00UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 31.89 124
68Omi Cet      02:19:20.8 -02:58:44  2.0 12.85  86
10Rho3Eri      03:04:16.6 -07:36:03  5.7  1.19  95
PPM 185396     03:06:28.2 -08:35:24  8.5  0.28  95
PPM 185375     03:05:25.5 -08:50:56  9.5  0.11  95
120348         03:05:32.2 -08:44:46 15.9        95
Positions are for J2000

Event circumstances last updated at 2017/01/01 19:03:00 UT

Marc W. Buie, Southwest Research Institute

RECON