RECON: TNO occultation with 14JE80

Event between 14JE80 and star GA0740:19879607 with event index number of 2486313

Geocentric closest approach at 2021/09/26 19:23:27 UTC

J2000 position of star is 18:33:28.1 -15:15:23
Equinox of date position of star is 18:34:42.6 -15:14:19
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon. Moon is 71% illuminated.
TNO apparent brightness V=22.6

TNO is 18.3 AU from the Sun and 18.2 AU from the Earth.
The TNO is moving 10.5 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 244 seconds.
The 1-sigma cross-track error in the shadow position is 3082 km.

The TNO has an absolute magnitude Hv=9.7
Diameter=70.1 km assuming a 5% albedo -- 6.7 sec chord
Diameter=28.6 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 14JE80, (2021/09/26 19:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:44.6 -26:28:42  0.9 30.96 176
Nunki          18:56:36.7 -26:16:04  2.0 12.15 147
PPM 234707     18:34:53.5 -14:50:09  6.1  0.41 150
PPM 234662     18:33:05.0 -15:09:57  7.8  0.40 150
PPM 234678     18:33:42.1 -15:31:04  8.9  0.37 150
14JE80         18:34:42.8 -15:14:19 15.1       150
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 14JE80, (2021/09/26 19:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.96 176
Nunki          18:55:15.9 -26:17:49  2.0 12.15 147
PPM 234707     18:33:39.1 -14:51:14  6.1  0.41 150
PPM 234662     18:31:50.4 -15:10:58  7.8  0.40 150
PPM 234678     18:32:27.3 -15:32:07  8.9  0.37 150
14JE80         18:33:28.1 -15:15:23 15.1       150
Positions are for J2000

Event circumstances last updated at 2021/09/16 00:59:38 UT

Marc W. Buie, Southwest Research Institute

RECON