RECON: TNO occultation with 229762

Event between (229762) 07UK126 and star UC4-458-007951 with event index number of 155001

Geocentric closest approach at 2018/11/08 22:11:12 UTC

J2000 position of star is 04:52:43.1 +01:28:49
Equinox of date position of star is 04:53:37.1 +01:30:29
Stellar brightness R=16.2, use SENSEUP=128
Star is 161 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=19.8

TNO is 42.2 AU from the Sun and 41.3 AU from the Earth.
The TNO is moving 22.4 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 104 seconds.
The 1-sigma cross-track error in the shadow position is 1623 km.

The TNO has an absolute magnitude Hv=3.5
Diameter=1202.3 km assuming a 5% albedo -- 53.8 sec chord
Diameter=490.8 km assuming a 30% albedo -- 22.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 229762, (2018/11/08 22:11UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:26.7 -08:10:52  0.1 11.11 150
67Bet Eri      05:08:46.7 -05:03:48  2.8  7.58 153
8Pi 5Ori       04:55:14.1 +02:28:12  3.7  1.03 161
PPM 148082     04:52:47.9 +01:16:46  8.5  0.32 161
PPM 148092     04:53:10.8 +01:32:23  8.9  0.13 161
229762         04:53:41.7 +01:30:38 16.2       160
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 229762, (2018/11/08 22:11UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 11.11 150
67Bet Eri      05:07:50.9 -05:05:13  2.8  7.58 153
8Pi 5Ori       04:54:15.1 +02:26:26  3.7  1.03 161
PPM 148082     04:51:49.4 +01:14:56  8.5  0.32 161
PPM 148092     04:52:12.2 +01:30:33  8.9  0.13 161
229762         04:52:43.1 +01:28:49 16.2       161
Positions are for J2000

Event circumstances last updated at 2017/05/19 18:05:31 UT

Marc W. Buie, Southwest Research Institute

RECON