RECON: TNO occultation with 13RD124

Event between 13RD124 and star GA0920:17956383 with event index number of 2070695

Geocentric closest approach at 2022/06/10 02:55:41 UTC

J2000 position of star is 22:05:36.4 +03:42:27
Equinox of date position of star is 22:06:42.4 +03:48:50
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 132 degrees from the moon. Moon is 75% illuminated.
TNO apparent brightness V=22.9

TNO is 40.4 AU from the Sun and 40.2 AU from the Earth.
The TNO is moving 6.9 km/sec on the sky relative to the star, or, 0.9 arcsec/hr.
The 1-sigma error in the time of the event is 477 seconds.
The 1-sigma cross-track error in the shadow position is 2813 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=236.6 km assuming a 5% albedo -- 39.1 sec chord
Diameter=96.6 km assuming a 30% albedo -- 16.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 13RD124, (2022/06/10 02:58UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:53.1 -29:30:10  1.2 35.59 132
Markab         23:05:52.8 +15:19:35  2.5 18.55 146
26The Peg      22:11:19.9 +06:18:32  3.5  2.74 133
PPM 172701     22:10:00.4 +04:20:47  7.8  0.97 133
PPM 172626     22:06:00.0 +04:05:04  9.2  0.32 132
13RD124        22:06:44.5 +03:49:02 14.9       132
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 13RD124, (2022/06/10 02:58UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 35.59 132
Markab         23:04:45.8 +15:12:18  2.5 18.55 146
26The Peg      22:10:12.4 +06:11:53  3.5  2.74 133
PPM 172701     22:08:52.4 +04:14:08  7.8  0.97 133
PPM 172626     22:04:52.1 +03:58:29  9.2  0.32 132
13RD124        22:05:36.4 +03:42:27 14.9       132
Positions are for J2000

Event circumstances last updated at 2021/10/04 01:51:27 UT

Marc W. Buie, Southwest Research Institute

RECON