RECON: TNO occultation with 03UV292

Event between 03UV292 and star UC4-541-015548 with event index number of 93092

Geocentric closest approach at 2017/12/22 13:51:10 UTC

J2000 position of star is 05:28:37.7 +18:03:27
Equinox of date position of star is 05:29:34.5 +18:04:11
Stellar brightness R=15.6
Star is 125 degrees from the moon. Moon is 16% illuminated.
TNO apparent brightness V=22.9

TNO is 36.9 AU from the Sun and 35.9 AU from the Earth.
The TNO is moving 25.1 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 574 seconds.
The 1-sigma cross-track error in the shadow position is 1354 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=210.9 km assuming a 5% albedo -- 8.4 sec chord
Diameter=86.1 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 03UV292, (2017/12/22 13:51UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:08.7 +07:24:32  0.4 12.46 129
Alnath         05:27:25.8 +28:37:16  1.6 10.56 125
115 Tau        05:28:13.1 +17:58:34  5.4  0.36 124
PPM 121011     05:30:22.3 +18:22:43  6.6  0.35 125
PPM 120992     05:29:25.2 +18:06:53  9.5  0.08 125
03UV292        05:29:40.7 +18:04:16 15.6       125
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.

Event circumstances last updated at 2016/03/13 18:18:03 UT

Marc W. Buie, Southwest Research Institute

RECON