RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0700:04777168 with event index number of 264012

Geocentric closest approach at 2020/05/16 09:13:24 UTC

J2000 position of star is 10:51:56.1 -18:44:11
Equinox of date position of star is 10:52:55.6 -18:50:38
Stellar brightness G=14.2, use SENSEUP=64
Star is 151 degrees from the moon. Moon is 33% illuminated.
TNO apparent brightness V=19.7

TNO is 8.5 AU from the Sun and 8.1 AU from the Earth.
The TNO is moving 10.3 km/sec on the sky relative to the star, or, 6.4 arcsec/hr.
The 1-sigma error in the time of the event is 33 seconds.
The 1-sigma cross-track error in the shadow position is 435 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=75.9 km assuming a 5% albedo -- 5.8 sec chord
Diameter=31.0 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2020/05/16 09:13UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:27.3 +11:52:01  1.3 32.53 163
4Gam Crv       12:16:51.4 -17:39:18  2.6 19.95 149
PPM 223444     10:47:52.1 -17:24:17  5.7  1.88 152
PPM 223580     10:53:22.4 -18:59:57  8.3  0.19 150
PPM 223575     10:53:14.9 -18:45:33  9.5  0.11 151
459865         10:52:56.1 -18:50:42 14.2       150
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, (2020/05/16 09:13UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 32.53 163
4Gam Crv       12:15:48.1 -17:32:31  2.6 19.95 149
PPM 223444     10:46:52.1 -17:17:49  5.7  1.88 152
PPM 223580     10:52:22.5 -18:53:26  8.3  0.19 150
PPM 223575     10:52:14.9 -18:39:02  9.5  0.11 151
459865         10:51:56.1 -18:44:11 14.2       150
Positions are for J2000

Event circumstances last updated at 2020/03/16 21:35:21 UT

Marc W. Buie, Southwest Research Institute

RECON