RECON: TNO occultation with 455209

Event between (455209) 01KT76 and star GA0700:06082357 with event index number of 277996

Geocentric closest approach at 2020/07/20 18:44:37 UTC

J2000 position of star is 15:58:51.3 -19:01:31
Equinox of date position of star is 15:59:55.8 -19:04:38
Stellar brightness G=15.4, use SENSEUP=128
Star is 122 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=23.6

TNO is 43.7 AU from the Sun and 43.1 AU from the Earth.
The TNO is moving 11.4 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 655 seconds.
The 1-sigma cross-track error in the shadow position is 3227 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 20.1 sec chord
Diameter=93.5 km assuming a 30% albedo -- 8.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 455209, (2020/07/20 18:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.3 -26:28:33  0.9 10.22 131
8Bet1Sco       16:06:38.1 -19:51:36  2.6  1.74 124
47 Lib         15:56:11.9 -19:26:31  5.9  0.98 121
PPM 230949     15:56:48.7 -18:51:00  8.2  0.80 121
PPM 231041     16:00:18.8 -18:57:55  9.9  0.13 122
455209         16:00:02.7 -19:04:58 15.4       123
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 455209, (2020/07/20 18:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.22 131
8Bet1Sco       16:05:26.2 -19:48:20  2.6  1.74 124
47 Lib         15:55:00.4 -19:22:59  5.9  0.98 121
PPM 230949     15:55:37.4 -18:47:28  8.2  0.80 121
PPM 231041     15:59:07.5 -18:54:29  9.9  0.13 122
455209         15:58:51.3 -19:01:31 15.4       122
Positions are for J2000

Event circumstances last updated at 2018/08/01 17:57:49 UT

Marc W. Buie, Southwest Research Institute

RECON