RECON: TNO occultation with 04KC19

Event between 04KC19 and star GA0680:18366515 with event index number of 259548

Geocentric closest approach at 2019/07/02 18:45:10 UTC

J2000 position of star is 17:47:25.9 -20:45:55
Equinox of date position of star is 17:48:35.5 -20:46:16
Stellar brightness G=16.1, use SENSEUP=128
Star is 167 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=23.3

TNO is 30.4 AU from the Sun and 29.4 AU from the Earth.
The TNO is moving 22.6 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 216 seconds.
The 1-sigma cross-track error in the shadow position is 1136 km.

The TNO has an absolute magnitude Hv=8.5
Diameter=121.3 km assuming a 5% albedo -- 5.4 sec chord
Diameter=49.5 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 04KC19, (2019/07/02 18:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.4 -26:28:25  0.9 18.73 149
35Eta Oph      17:11:29.9 -15:44:52  2.6 10.14 157
58 Oph         17:44:36.0 -21:41:28  4.9  1.31 166
PPM 267302     17:48:41.3 -20:50:34  7.6  0.08 167
04KC19         17:48:35.8 -20:46:16 16.1       167
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 04KC19, (2019/07/02 18:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.73 149
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.14 157
58 Oph         17:43:25.7 -21:41:00  4.9  1.31 166
PPM 267302     17:47:31.4 -20:50:14  7.6  0.08 167
04KC19         17:47:25.9 -20:45:55 16.1       167
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:21:51 UT

Marc W. Buie, Southwest Research Institute

RECON