RECON: TNO occultation with 363401

Event between (363401) 03LB7 and star GA0660:08792168 with event index number of 279029

Geocentric closest approach at 2020/07/18 20:00:46 UTC

J2000 position of star is 16:59:38.4 -23:48:02
Equinox of date position of star is 17:00:46.6 -23:49:39
Stellar brightness G=15.2, use SENSEUP=128
Star is 163 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=22.9

TNO is 41.4 AU from the Sun and 40.6 AU from the Earth.
The TNO is moving 17.5 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 685 seconds.
The 1-sigma cross-track error in the shadow position is 3608 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 15.7 sec chord
Diameter=112.4 km assuming a 30% albedo -- 6.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 363401, (2020/07/18 20:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.2 -26:28:33  0.9  7.33 156
23Tau Sco      16:37:09.9 -28:15:25  2.8  6.93 158
26 Oph         17:01:25.2 -25:01:07  5.8  1.19 163
PPM 266216     17:00:02.1 -24:01:00  8.5  0.27 163
PPM 266234     17:00:41.5 -23:34:51  9.4  0.25 163
363401         17:00:53.3 -23:49:48 15.2       163
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 363401, (2020/07/18 20:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.33 156
23Tau Sco      16:35:53.0 -28:12:58  2.8  6.93 158
26 Oph         17:00:09.6 -24:59:22  5.8  1.19 163
PPM 266216     16:58:47.2 -23:59:13  8.5  0.27 163
PPM 266234     16:59:26.7 -23:33:04  9.4  0.25 163
363401         16:59:38.4 -23:48:02 15.2       163
Positions are for J2000

Event circumstances last updated at 2018/09/21 18:02:14 UT

Marc W. Buie, Southwest Research Institute

RECON