RECON: TNO occultation with 01HA59

Event between 01HA59 and star UC4-359-072204 with event index number of 121835

Geocentric closest approach at 2018/06/09 12:23:32 UTC

J2000 position of star is 15:36:38.3 -18:18:06
Equinox of date position of star is 15:37:39.9 -18:21:36
Stellar brightness R=16.0, use SENSEUP=128
Star is 145 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=23.1

TNO is 45.8 AU from the Sun and 44.8 AU from the Earth.
The TNO is moving 22.9 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 342 seconds.
The 1-sigma cross-track error in the shadow position is 4057 km.

The TNO has an absolute magnitude Hv=6.5
Diameter=299.2 km assuming a 5% albedo -- 13.0 sec chord
Diameter=122.2 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 01HA59, (2018/06/09 12:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.4 -26:28:17  0.9 14.64 131
8Bet1Sco       16:06:30.7 -19:51:16  2.6  6.97 138
41 Lib         15:39:58.4 -19:21:41  5.3  1.14 144
PPM 230484     15:38:16.7 -18:23:41  8.4  0.14 145
PPM 230477     15:37:48.2 -18:14:12  9.7  0.13 145
01HA59         15:37:41.6 -18:21:42 16.0       145
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 01HA59, (2018/06/09 12:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.64 131
8Bet1Sco       16:05:26.2 -19:48:20  2.6  6.97 138
41 Lib         15:38:54.7 -19:18:08  5.3  1.14 144
PPM 230484     15:37:13.4 -18:20:06  8.4  0.14 145
PPM 230477     15:36:44.9 -18:10:37  9.7  0.13 145
01HA59         15:36:38.3 -18:18:06 16.0       145
Positions are for J2000

Event circumstances last updated at 2017/12/04 18:43:40 UT

Marc W. Buie, Southwest Research Institute

RECON