RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0660:08867517 with event index number of 256917

Geocentric closest approach at 2020/04/29 17:59:06 UTC

J2000 position of star is 17:00:31.3 -23:27:11
Equinox of date position of star is 17:01:42.0 -23:28:50
Stellar brightness G=14.2, use SENSEUP=64
Star is 140 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=21.1

TNO is 30.5 AU from the Sun and 29.7 AU from the Earth.
The TNO is moving 16.8 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 271 seconds.
The 1-sigma cross-track error in the shadow position is 2053 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 20.6 sec chord
Diameter=141.6 km assuming a 30% albedo -- 8.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 470593, (2020/04/29 17:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.4 -26:28:31  0.9  7.65 134
23Tau Sco      16:37:09.1 -28:15:23  2.8  7.31 135
26 Oph         17:01:24.4 -25:01:06  5.8  1.54 140
PPM 266304     17:03:22.6 -23:18:59  8.4  0.41 141
PPM 266274     17:02:20.7 -23:30:39  9.4  0.14 140
470593         17:01:45.2 -23:28:55 14.2       141
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, (2020/04/29 17:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.65 134
23Tau Sco      16:35:53.0 -28:12:58  2.8  7.31 135
26 Oph         17:00:09.6 -24:59:22  5.8  1.54 140
PPM 266304     17:02:08.7 -23:17:18  8.4  0.41 141
PPM 266274     17:01:06.8 -23:28:56  9.4  0.14 140
470593         17:00:31.3 -23:27:11 14.2       140
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:32:10 UT

Marc W. Buie, Southwest Research Institute

RECON