RECON: TNO occultation with 523686

Event between (523686) 14DB143 and star GA0840:05827191 with event index number of 308258

Geocentric closest approach at 2020/06/19 11:40:25 UTC

J2000 position of star is 17:27:20.6 -04:44:39
Equinox of date position of star is 17:28:23.7 -04:45:35
Stellar brightness G=15.6, use SENSEUP=128
Star is 159 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=22.0

TNO is 19.6 AU from the Sun and 18.7 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 6.0 arcsec/hr.
The 1-sigma error in the time of the event is 47 seconds.
The 1-sigma cross-track error in the shadow position is 690 km.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 4.1 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523686, (2020/06/19 11:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.9 -26:28:32  0.9 25.73 173
60Bet Oph      17:44:29.1 +04:33:37  2.8 10.15 149
PPM 200658     17:27:43.1 -05:06:11  4.5  0.39 159
PPM 200729     17:31:25.0 -04:23:02  6.9  0.83 158
PPM 200679     17:28:35.5 -04:31:34 10.0  0.24 158
523686         17:28:25.8 -04:45:36 15.6       158
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 523686, (2020/06/19 11:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 25.73 173
60Bet Oph      17:43:28.3 +04:34:05  2.8 10.15 149
PPM 200658     17:26:37.8 -05:05:13  4.5  0.39 159
PPM 200729     17:30:20.0 -04:22:10  6.9  0.83 158
PPM 200679     17:27:30.4 -04:30:37 10.0  0.24 158
523686         17:27:20.6 -04:44:39 15.6       159
Positions are for J2000

Event circumstances last updated at 2019/10/16 21:13:48 UT

Marc W. Buie, Southwest Research Institute

RECON