RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star UC4-393-049958 with event index number of 188563

Geocentric closest approach at 2019/04/24 14:27:03 UTC

J2000 position of star is 09:49:41.2 -11:25:50
Equinox of date position of star is 09:50:33.8 -11:30:53
Stellar brightness R=14.3, use SENSEUP=64
Star is 122 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=19.5

TNO is 8.8 AU from the Sun and 8.3 AU from the Earth.
The TNO is moving 9.1 km/sec on the sky relative to the star, or, 5.5 arcsec/hr.
The 1-sigma error in the time of the event is 84 seconds.
The 1-sigma cross-track error in the shadow position is 1211 km.

The TNO has an absolute magnitude Hv=9.7
Diameter=69.2 km assuming a 5% albedo -- 7.6 sec chord
Diameter=28.2 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2019/04/24 14:27UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:23.9 +11:52:20  1.3 23.85 128
Alphard        09:28:32.2 -08:44:36  2.0  6.11 128
8Gam Sex       09:53:27.8 -08:11:48  4.8  3.40 123
PPM 222091     09:51:50.2 -11:49:42  8.1  0.43 121
PPM 222053     09:50:02.7 -11:45:44  9.4  0.28 122
459865         09:50:37.8 -11:31:17 14.3       121
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, (2019/04/24 14:27UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 23.85 128
Alphard        09:27:35.2 -08:39:31  2.0  6.11 128
8Gam Sex       09:52:30.4 -08:06:19  4.8  3.40 123
PPM 222091     09:50:53.7 -11:44:15  8.1  0.43 121
PPM 222053     09:49:06.2 -11:40:18  9.4  0.28 122
459865         09:49:41.2 -11:25:50 14.3       122
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:52:25 UT

Marc W. Buie, Southwest Research Institute

RECON