RECON: TNO occultation with 13UR17

Event between 13UR17 and star GA0960:00147700 with event index number of 2466274

Geocentric closest approach at 2022/09/18 03:50:04 UTC

J2000 position of star is 01:43:11.6 +07:37:44
Equinox of date position of star is 01:44:21.6 +07:44:24
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 62 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=24.3

TNO is 45.8 AU from the Sun and 44.9 AU from the Earth.
The TNO is moving 21.1 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 644 seconds.
The 1-sigma cross-track error in the shadow position is 5580 km.

The TNO has an absolute magnitude Hv=7.6
Diameter=178.7 km assuming a 5% albedo -- 8.5 sec chord
Diameter=72.9 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 13UR17, (2022/09/18 03:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:13.6 +16:33:11  0.8 43.06  20
6Bet Ari       01:55:54.0 +20:55:05  2.6 13.47  54
110Omi Psc     01:46:35.8 +09:16:16  4.3  1.62  60
PPM 144954     01:46:54.5 +08:40:20  6.6  1.12  61
PPM 144901     01:43:36.7 +07:31:16  9.7  0.29  62
13UR17         01:44:23.2 +07:44:33 16.8        61
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 13UR17, (2022/09/18 03:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 43.06  20
6Bet Ari       01:54:38.5 +20:48:26  2.6 13.47  54
110Omi Psc     01:45:23.7 +09:09:29  4.3  1.62  60
PPM 144954     01:45:42.6 +08:33:33  6.6  1.12  61
PPM 144901     01:42:25.1 +07:24:26  9.7  0.29  62
13UR17         01:43:11.6 +07:37:44 16.8        62
Positions are for J2000

Event circumstances last updated at 2022/03/14 01:07:50 UT

Marc W. Buie, Southwest Research Institute

RECON