RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star UC4-397-048445 with event index number of 167392

Geocentric closest approach at 2018/11/14 09:55:40 UTC

J2000 position of star is 10:12:37.0 -10:37:37
Equinox of date position of star is 10:13:30.1 -10:42:58
Stellar brightness R=15.4, use SENSEUP=128
Star is 144 degrees from the moon. Moon is 39% illuminated.
TNO apparent brightness V=19.8

TNO is 9.0 AU from the Sun and 9.2 AU from the Earth.
The TNO is moving 22.9 km/sec on the sky relative to the star, or, 12.3 arcsec/hr.
The 1-sigma error in the time of the event is 47 seconds.
The 1-sigma cross-track error in the shadow position is 1165 km.

The TNO has an absolute magnitude Hv=9.7
Diameter=69.2 km assuming a 5% albedo -- 3.0 sec chord
Diameter=28.2 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2018/11/14 09:56UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:22.5 +11:52:27  1.3 22.62 159
Alphard        09:28:30.9 -08:44:29  2.0 11.27 151
PPM 222699     10:17:04.8 -11:17:53  5.9  1.04 143
PPM 222612     10:13:15.1 -10:24:55  8.2  0.31 144
PPM 222604     10:13:01.9 -10:57:22  9.4  0.27 144
459865         10:13:32.9 -10:43:15 15.4       143
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 459865, (2018/11/14 09:56UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 22.62 159
Alphard        09:27:35.2 -08:39:31  2.0 11.27 151
PPM 222699     10:16:08.9 -11:12:12  5.9  1.04 143
PPM 222612     10:12:19.2 -10:19:17  8.2  0.31 144
PPM 222604     10:12:06.1 -10:51:44  9.4  0.27 144
459865         10:12:37.0 -10:37:37 15.4       144
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:02:44 UT

Marc W. Buie, Southwest Research Institute

RECON