RECON: TNO occultation with 13GF137

Event between 13GF137 and star GA0700:05522429 with event index number of 1565435

Geocentric closest approach at 2020/06/10 11:09:36 UTC

J2000 position of star is 14:44:47.2 -18:35:47
Equinox of date position of star is 14:45:55.3 -18:40:51
Stellar brightness G=14.6, use SENSEUP=128
Star is 94 degrees from the moon. Moon is 76% illuminated.
TNO apparent brightness V=25.9

TNO is 38.4 AU from the Sun and 37.5 AU from the Earth.
The TNO is moving 19.4 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 225 seconds.
The 1-sigma cross-track error in the shadow position is 3446 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=143.2 km assuming a 5% albedo -- 3.1 sec chord
Diameter=58.5 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 13GF137, (2020/06/10 11:10UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:16.4 -11:16:03  1.0 20.60 114
27Bet Lib      15:18:06.6 -09:27:26  2.6 12.08  90
PPM 229408     14:53:00.4 -18:26:18  6.2  1.69  92
PPM 229246     14:46:58.2 -18:25:35  8.3  0.35  94
PPM 229230     14:46:10.8 -18:31:25  9.8  0.17  94
13GF137        14:45:56.1 -18:40:55 14.6        93
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 13GF137, (2020/06/10 11:10UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 20.60 114
27Bet Lib      15:17:00.3 -09:22:59  2.6 12.08  90
PPM 229408     14:51:51.3 -18:21:19  6.2  1.69  92
PPM 229246     14:45:49.3 -18:20:28  8.3  0.35  94
PPM 229230     14:45:01.9 -18:26:18  9.8  0.17  94
13GF137        14:44:47.2 -18:35:47 14.6        94
Positions are for J2000

Event circumstances last updated at 2020/03/10 21:36:38 UT

Marc W. Buie, Southwest Research Institute

RECON