RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star UC4-428-049165 with event index number of 111217

Geocentric closest approach at 2018/03/18 00:48:52 UTC

J2000 position of star is 08:59:06.5 -04:30:55
Equinox of date position of star is 09:00:00.2 -04:35:08
Stellar brightness R=13.3, use SENSEUP=32
Star is 130 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=19.6

TNO is 9.3 AU from the Sun and 8.6 AU from the Earth.
The TNO is moving 13.9 km/sec on the sky relative to the star, or, 8.0 arcsec/hr.
The 1-sigma error in the time of the event is 80 seconds.
The 1-sigma cross-track error in the shadow position is 967 km.

The TNO has an absolute magnitude Hv=9.7
Diameter=69.2 km assuming a 5% albedo -- 5.0 sec chord
Diameter=28.2 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2018/03/18 00:49UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:20.4 +11:52:39  1.3 23.83 147
Alphard        09:28:28.9 -08:44:18  2.0  8.20 136
PPM 191823     08:55:11.8 -05:30:16  6.4  1.51 129
PPM 191884     08:58:53.0 -04:55:51  7.1  0.45 130
PPM 191900     08:59:48.4 -04:36:47  9.5  0.06 130
459865         09:00:01.1 -04:35:12 13.3       130
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, (2018/03/18 00:49UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 23.83 147
Alphard        09:27:35.2 -08:39:31  2.0  8.20 136
PPM 191823     08:54:17.5 -05:26:04  6.4  1.51 129
PPM 191884     08:57:58.5 -04:51:35  7.1  0.45 130
PPM 191900     08:58:53.8 -04:32:30  9.5  0.06 130
459865         08:59:06.5 -04:30:55 13.3       130
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:21:34 UT

Marc W. Buie, Southwest Research Institute

RECON