RECON: TNO occultation with 01HZ58

Event between 01HZ58 and star UC4-358-075757 with event index number of 189452

Geocentric closest approach at 2019/05/09 01:30:19 UTC

J2000 position of star is 15:49:23.8 -18:31:53
Equinox of date position of star is 15:50:23.9 -18:35:01
Stellar brightness R=16.3, use SENSEUP=128
Star is 140 degrees from the moon. Moon is 19% illuminated.
TNO apparent brightness V=22.7

TNO is 43.7 AU from the Sun and 42.8 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 393 seconds.
The 1-sigma cross-track error in the shadow position is 5702 km.

The TNO has an absolute magnitude Hv=6.3
Diameter=332.7 km assuming a 5% albedo -- 13.6 sec chord
Diameter=135.8 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 01HZ58, (2019/05/09 01:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.8 -26:28:24  0.9 12.15 150
8Bet1Sco       16:06:33.9 -19:51:25  2.6  4.00 144
47 Lib         15:56:07.7 -19:26:19  5.9  1.58 141
PPM 230815     15:51:09.9 -18:12:02  8.0  0.42 140
PPM 230787     15:49:58.4 -18:44:42  9.5  0.20 140
01HZ58         15:50:30.6 -18:35:21 16.3       140
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 01HZ58, (2019/05/09 01:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.15 150
8Bet1Sco       16:05:26.2 -19:48:20  2.6  4.00 144
47 Lib         15:55:00.4 -19:22:59  5.9  1.58 141
PPM 230815     15:50:03.2 -18:08:34  8.0  0.42 140
PPM 230787     15:48:51.5 -18:41:13  9.5  0.20 140
01HZ58         15:49:23.8 -18:31:53 16.3       140
Positions are for J2000

Event circumstances last updated at 2017/06/01 18:10:06 UT

Marc W. Buie, Southwest Research Institute

RECON