RECON: TNO occultation with 14UO224

Event between 14UO224 and star GA1100:01452173 with event index number of 1030584

Geocentric closest approach at 2021/01/03 20:27:40 UTC

J2000 position of star is 05:48:52.0 +21:30:34
Equinox of date position of star is 05:50:07.5 +21:30:53
Stellar brightness G=12.6, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 74 degrees from the moon. Moon is 77% illuminated.
TNO apparent brightness V=21.5

TNO is 38.0 AU from the Sun and 37.1 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 56 seconds.
The 1-sigma cross-track error in the shadow position is 1345 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=434.5 km assuming a 5% albedo -- 18.0 sec chord
Diameter=177.4 km assuming a 30% albedo -- 7.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 14UO224, (2021/01/03 20:28UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.6 +07:24:33  0.4 14.18  74
Alnath         05:27:37.3 +28:37:24  1.6  8.74  78
54Chi1Ori      05:55:37.6 +20:16:41  5.1  1.78  73
PPM 094925     05:50:28.2 +21:08:28  7.1  0.38  74
PPM 094937     05:50:47.0 +21:19:00  9.5  0.25  74
14UO224        05:50:07.7 +21:30:53 12.6        73
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 14UO224, (2021/01/03 20:28UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.18  74
Alnath         05:26:17.5 +28:36:23  1.6  8.74  78
54Chi1Ori      05:54:22.7 +20:16:32  5.1  1.78  73
PPM 094925     05:49:12.8 +21:08:09  7.1  0.38  74
PPM 094937     05:49:31.4 +21:18:42  9.5  0.25  74
14UO224        05:48:52.0 +21:30:34 12.6        74
Positions are for J2000

Event circumstances last updated at 2020/12/17 21:49:19 UT

Marc W. Buie, Southwest Research Institute

RECON