RECON: TNO occultation with 523713

Event between (523713) 14JX80 and star GA0920:05017152 with event index number of 307414

Geocentric closest approach at 2020/02/20 05:15:14 UTC

J2000 position of star is 17:22:18.1 +02:32:34
Equinox of date position of star is 17:23:17.8 +02:31:30
Stellar brightness G=15.2, use SENSEUP=128
Star is 42 degrees from the moon. Moon is 11% illuminated.
TNO apparent brightness V=22.0

TNO is 36.1 AU from the Sun and 36.4 AU from the Earth.
The TNO is moving 20.7 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 89 seconds.
The 1-sigma cross-track error in the shadow position is 1508 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 16.7 sec chord
Diameter=141.6 km assuming a 30% albedo -- 6.8 sec chord
Dynamical classification is 5:2EEE+5:2EII
 
 
 
 
 
 
 
 

Star training set for 523713, (2020/02/20 05:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:38.7 -26:28:30  0.9 31.67  43
60Bet Oph      17:44:28.1 +04:33:37  2.8  5.66  39
49Sig Oph      17:27:30.9 +04:07:27  4.3  1.91  42
PPM 163824     17:20:47.5 +02:07:13  8.0  0.75  42
PPM 163878     17:23:00.4 +02:59:26  9.8  0.47  42
PPM 163897     17:23:32.7 +02:31:24 11.2  0.06  42
523713         17:23:18.9 +02:31:29 15.2        42
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 523713, (2020/02/20 05:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 31.67  43
60Bet Oph      17:43:28.3 +04:34:05  2.8  5.66  39
49Sig Oph      17:26:30.9 +04:08:25  4.3  1.91  42
PPM 163824     17:19:46.5 +02:08:23  8.0  0.75  42
PPM 163878     17:21:59.9 +03:00:32  9.8  0.47  42
PPM 163897     17:22:32.0 +02:32:29 11.2  0.06  42
523713         17:22:18.1 +02:32:34 15.2        42
Positions are for J2000

Event circumstances last updated at 2019/10/15 22:10:31 UT

Marc W. Buie, Southwest Research Institute

RECON