RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star UC4-338-086103 with event index number of 186911

Geocentric closest approach at 2019/04/29 15:29:07 UTC

J2000 position of star is 16:49:05.3 -22:27:44
Equinox of date position of star is 16:50:09.8 -22:29:33
Stellar brightness R=16.1, use SENSEUP=128
Star is 85 degrees from the moon. Moon is 26% illuminated.
TNO apparent brightness V=21.1

TNO is 30.3 AU from the Sun and 29.5 AU from the Earth.
The TNO is moving 17.4 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 134 seconds.
The 1-sigma cross-track error in the shadow position is 1380 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 20.0 sec chord
Diameter=141.6 km assuming a 30% albedo -- 8.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 470593, (2019/04/29 15:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.7 -26:28:24  0.9  5.98  88
23Tau Sco      16:37:05.3 -28:15:16  2.8  6.48  87
PPM 266088     16:54:33.9 -20:26:47  5.7  2.28  84
PPM 266012     16:50:44.3 -21:53:05  7.4  0.62  85
PPM 265990     16:49:50.9 -22:36:57  9.5  0.15  85
470593         16:50:14.9 -22:29:41 16.1        85
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 470593, (2019/04/29 15:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  5.98  88
23Tau Sco      16:35:53.0 -28:12:58  2.8  6.48  87
PPM 266088     16:53:25.2 -20:24:57  5.7  2.28  84
PPM 266012     16:49:35.0 -21:51:09  7.4  0.62  85
PPM 265990     16:48:41.3 -22:34:59  9.5  0.15  85
470593         16:49:05.3 -22:27:44 16.1        85
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:53:06 UT

Marc W. Buie, Southwest Research Institute

RECON