RECON: TNO occultation with 14JR80

Event between 14JR80 and star GA0680:35702441 with event index number of 311967

Geocentric closest approach at 2019/08/21 18:50:00 UTC

J2000 position of star is 19:56:01.6 -20:22:08
Equinox of date position of star is 19:57:09.7 -20:18:58
Stellar brightness G=16.3, use SENSEUP=128
Star is 100 degrees from the moon. Moon is 68% illuminated.
TNO apparent brightness V=21.3

TNO is 40.9 AU from the Sun and 40.1 AU from the Earth.
The TNO is moving 20.7 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 116 seconds.
The 1-sigma cross-track error in the shadow position is 1490 km.

The TNO has an absolute magnitude Hv=5.1
Diameter=572.8 km assuming a 5% albedo -- 27.7 sec chord
Diameter=233.9 km assuming a 30% albedo -- 11.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 14JR80, (2019/08/21 18:50UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:43.9 -29:31:04  1.2 41.91  63
Nunki          18:56:28.9 -26:16:14  2.0 15.14 114
57 Sgr         19:53:20.4 -18:59:37  5.8  1.60 101
PPM 236688     19:56:32.5 -19:14:24  7.2  1.09 100
PPM 270454     19:57:01.5 -20:17:35  9.4  0.04 100
14JR80         19:57:10.5 -20:18:56 16.3       100
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 14JR80, (2019/08/21 18:50UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 41.91  63
Nunki          18:55:15.9 -26:17:49  2.0 15.14 114
57 Sgr         19:52:12.0 -19:02:43  5.8  1.60 101
PPM 236688     19:55:24.1 -19:17:34  7.2  1.09 100
PPM 270454     19:55:52.7 -20:20:47  9.4  0.04 100
14JR80         19:56:01.6 -20:22:08 16.3       100
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:34:30 UT

Marc W. Buie, Southwest Research Institute

RECON