RECON: TNO occultation with 03TL58

Event between 03TL58 and star GA1100:01844933 with event index number of 247186

Geocentric closest approach at 2020/02/18 13:44:40 UTC

J2000 position of star is 06:14:31.4 +20:47:10
Equinox of date position of star is 06:15:40.0 +20:46:44
Stellar brightness G=16.2, use SENSEUP=128
Star is 177 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=23.5

TNO is 41.8 AU from the Sun and 41.2 AU from the Earth.
The TNO is moving 12.7 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 588 seconds.
The 1-sigma cross-track error in the shadow position is 2222 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=219.8 km assuming a 5% albedo -- 17.4 sec chord
Diameter=89.7 km assuming a 30% albedo -- 7.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 03TL58, (2020/02/18 13:45UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:15.7 +07:24:33  0.4 14.17 164
Alhena         06:38:52.5 +16:22:50  1.9  7.03 170
71 Ori         06:16:01.9 +19:08:52  5.6  1.63 176
PPM 095570     06:12:35.3 +20:53:58  6.7  0.74 178
PPM 095635     06:15:25.9 +20:40:39  9.6  0.12 177
PPM 095645     06:15:57.4 +20:44:53 11.0  0.06 177
03TL58         06:15:43.5 +20:46:43 16.2       177
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, (2020/02/18 13:45UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.17 164
Alhena         06:37:42.8 +16:23:57  1.9  7.03 170
71 Ori         06:14:50.7 +19:09:20  5.6  1.63 176
PPM 095570     06:11:23.2 +20:54:19  6.7  0.74 178
PPM 095635     06:14:13.8 +20:41:05  9.6  0.12 177
PPM 095645     06:14:45.3 +20:45:20 11.0  0.06 177
03TL58         06:14:31.4 +20:47:10 16.2       177
Positions are for J2000

Event circumstances last updated at 2019/02/22 20:26:23 UT

Marc W. Buie, Southwest Research Institute

RECON