RECON: TNO occultation with 03TL58

Event between 03TL58 and star UC4-555-023951 with event index number of 174403

Geocentric closest approach at 2019/01/23 21:36:22 UTC

J2000 position of star is 06:10:12.1 +20:58:46
Equinox of date position of star is 06:11:13.4 +20:58:30
Stellar brightness R=16.0, use SENSEUP=128
Star is 69 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=23.4

TNO is 41.8 AU from the Sun and 40.9 AU from the Earth.
The TNO is moving 21.4 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 569 seconds.
The 1-sigma cross-track error in the shadow position is 1817 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=219.8 km assuming a 5% albedo -- 10.3 sec chord
Diameter=89.7 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 03TL58, (2019/01/23 21:36UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.3 +07:24:33  0.4 14.05  74
Alhena         06:38:48.8 +16:22:53  1.9  7.96  63
62Chi2Ori      06:05:03.1 +20:08:11  4.5  1.69  71
PPM 095533     06:11:15.1 +21:13:50  8.5  0.26  69
03TL58         06:11:20.5 +20:58:28 16.0        69
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 03TL58, (2019/01/23 21:36UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.05  74
Alhena         06:37:42.8 +16:23:57  1.9  7.96  63
62Chi2Ori      06:03:55.2 +20:08:18  4.5  1.69  71
PPM 095533     06:10:06.6 +21:14:08  8.5  0.26  69
03TL58         06:10:12.1 +20:58:46 16.0        69
Positions are for J2000

Event circumstances last updated at 2017/02/01 18:25:38 UT

Marc W. Buie, Southwest Research Institute

RECON