RECON: TNO occultation with 03UT292

Event between 03UT292 and star UC4-494-012850 with event index number of 93088

Geocentric closest approach at 2017/12/27 21:48:02 UTC

J2000 position of star is 05:34:13.6 +08:39:00
Equinox of date position of star is 05:35:06.7 +08:39:36
Stellar brightness R=16.0
Star is 58 degrees from the moon. Moon is 66% illuminated.
TNO apparent brightness V=21.4

TNO is 28.1 AU from the Sun and 27.2 AU from the Earth.
The TNO is moving 23.3 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 288 seconds.
The 1-sigma cross-track error in the shadow position is 1678 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=252.4 km assuming a 5% albedo -- 10.8 sec chord
Diameter=103.0 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 03UT292, (2017/12/27 21:48UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:08.8 +07:24:32  0.4  5.33  63
Bellatrix      05:26:05.8 +06:21:52  1.6  3.22  56
PPM 149227     05:38:18.4 +08:57:42  5.8  0.82  59
PPM 149091     05:32:40.2 +09:14:17  7.8  0.85  58
PPM 149127     05:34:18.5 +08:33:00  9.1  0.25  58
03UT292        05:35:12.6 +08:39:39 16.0        58
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 18:18:17 UT

Marc W. Buie, Southwest Research Institute

RECON