RECON: TNO occultation with 14JP80

Event between 14JP80 and star UC4-391-128195 with event index number of 188898

Geocentric closest approach at 2019/04/11 06:52:30 UTC

J2000 position of star is 20:45:51.7 -11:59:07
Equinox of date position of star is 20:46:50.6 -11:55:09
Stellar brightness R=15.9, use SENSEUP=128
Star is 141 degrees from the moon. Moon is 34% illuminated.
TNO apparent brightness V=21.5

TNO is 42.2 AU from the Sun and 42.5 AU from the Earth.
The TNO is moving 14.8 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 957 seconds.
The 1-sigma cross-track error in the shadow position is 2505 km.

The TNO has an absolute magnitude Hv=5.1
Diameter=578.1 km assuming a 5% albedo -- 39.1 sec chord
Diameter=236.0 km assuming a 30% albedo -- 16.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 14JP80, (2019/04/11 06:53UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:42.7 -29:31:11  1.2 35.29 115
Tarazed        19:47:10.5 +10:39:41  2.7 27.01 140
PPM 237993     20:51:45.4 -12:28:20  5.9  1.31 140
PPM 237849     20:45:12.4 -11:32:00  8.4  0.57 141
PPM 237889     20:47:14.1 -11:49:41  9.4  0.12 141
14JP80         20:46:55.0 -11:54:51 15.9       141
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 14JP80, (2019/04/11 06:53UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 35.29 115
Tarazed        19:46:15.6 +10:36:48  2.7 27.01 140
PPM 237993     20:50:41.9 -12:32:43  5.9  1.31 140
PPM 237849     20:44:09.2 -11:36:14  8.4  0.57 141
PPM 237889     20:46:10.8 -11:53:58  9.4  0.12 141
14JP80         20:45:51.7 -11:59:07 15.9       141
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:51:01 UT

Marc W. Buie, Southwest Research Institute

RECON