RECON: TNO occultation with 03UN292

Event between 03UN292 and star UC4-567-012282 with event index number of 104153

Geocentric closest approach at 2017/12/31 14:25:38 UTC

J2000 position of star is 04:51:29.7 +23:12:59
Equinox of date position of star is 04:52:32.6 +23:14:40
Stellar brightness R=16.4, use SENSEUP=128
Star is 7 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=23.5

TNO is 40.3 AU from the Sun and 39.4 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 583 seconds.
The 1-sigma cross-track error in the shadow position is 5811 km.

The TNO has an absolute magnitude Hv=7.4
Diameter=196.8 km assuming a 5% albedo -- 8.8 sec chord
Diameter=80.3 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 03UN292, (2017/12/31 14:26UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.3 +16:32:39  0.8  7.64   9
Alnath         05:27:25.9 +28:37:16  1.6  9.50  10
PPM 093742     04:46:47.8 +23:39:35  6.1  1.39   8
PPM 093857     04:54:39.4 +23:20:39  7.8  0.49   6
PPM 093831     04:52:57.3 +23:23:02  9.0  0.16   7
03UN292        04:52:34.9 +23:14:44 16.4         7
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 03UN292, (2017/12/31 14:26UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  7.64   9
Alnath         05:26:17.5 +28:36:24  1.6  9.50  10
PPM 093742     04:45:42.5 +23:37:41  6.1  1.39   8
PPM 093857     04:53:34.1 +23:18:56  7.8  0.49   6
PPM 093831     04:51:52.0 +23:21:17  9.0  0.16   7
03UN292        04:51:29.7 +23:12:59 16.4         7
Positions are for J2000

Event circumstances last updated at 2017/05/14 18:38:25 UT

Marc W. Buie, Southwest Research Institute

RECON