RECON: TNO occultation with 385437

Event between (385437) 03GH55 and star GA0700:05827709 with event index number of 272793

Geocentric closest approach at 2020/06/22 00:02:49 UTC

J2000 position of star is 15:33:15.9 -18:10:00
Equinox of date position of star is 15:34:25.2 -18:14:01
Stellar brightness G=12.9, use SENSEUP=32
Star is 136 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=26.2

TNO is 41.2 AU from the Sun and 40.3 AU from the Earth.
The TNO is moving 19.2 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 202 seconds.
The 1-sigma cross-track error in the shadow position is 1971 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=363.1 km assuming a 5% albedo -- 3.1 sec chord
Diameter=148.2 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 385437, (2020/06/22 00:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.0 -26:28:33  0.9 15.37 150
7Del Sco       16:01:32.9 -22:40:42  2.3  7.75 143
35Zet4Lib      15:34:04.8 -16:55:16  5.6  1.32 135
PPM 230414     15:35:08.5 -17:31:43  8.4  0.73 136
PPM 230387     15:33:57.3 -17:59:50  9.2  0.26 135
385437         15:34:26.1 -18:14:05 12.9       136
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 385437, (2020/06/22 00:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.37 150
7Del Sco       16:00:20.0 -22:37:18  2.3  7.75 143
35Zet4Lib      15:32:55.2 -16:51:11  5.6  1.32 135
PPM 230414     15:33:58.6 -17:27:39  8.4  0.73 136
PPM 230387     15:32:47.2 -17:55:45  9.2  0.26 135
385437         15:33:15.9 -18:10:00 12.9       136
Positions are for J2000

Event circumstances last updated at 2020/03/16 21:45:25 UT

Marc W. Buie, Southwest Research Institute

RECON