RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0720:06385311 with event index number of 287359

Geocentric closest approach at 2020/09/15 13:28:09 UTC

J2000 position of star is 16:39:29.0 -17:12:01
Equinox of date position of star is 16:40:40.6 -17:14:23
Stellar brightness G=15.1, use SENSEUP=128
Star is 103 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=21.2

TNO is 11.9 AU from the Sun and 12.1 AU from the Earth.
The TNO is moving 17.7 km/sec on the sky relative to the star, or, 7.3 arcsec/hr.
The 1-sigma error in the time of the event is 33 seconds.
The 1-sigma cross-track error in the shadow position is 492 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=63.1 km assuming a 5% albedo -- 3.4 sec chord
Diameter=25.8 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 492338, (2020/09/15 13:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.8 -26:28:34  0.9  9.52 103
13Zet Oph      16:38:18.1 -10:36:27  2.6  6.66 101
PPM 232030     16:42:46.4 -17:46:50  5.0  0.74 104
PPM 232029     16:42:45.9 -16:58:19  8.4  0.57 104
PPM 232002     16:41:54.9 -17:21:11  9.4  0.32 104
492338         16:40:40.8 -17:14:23 15.1       104
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 492338, (2020/09/15 13:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.52 103
13Zet Oph      16:37:09.6 -10:34:01  2.6  6.66 101
PPM 232030     16:41:34.4 -17:44:32  5.0  0.74 104
PPM 232029     16:41:34.3 -16:56:01  8.4  0.57 104
PPM 232002     16:40:43.1 -17:18:51  9.4  0.32 104
492338         16:39:29.0 -17:12:01 15.1       103
Positions are for J2000

Event circumstances last updated at 2020/08/28 21:21:59 UT

Marc W. Buie, Southwest Research Institute

RECON