RECON: TNO occultation with 523712

Event between (523712) 14JS80 and star GA0700:34205820 with event index number of 1099152

Geocentric closest approach at 2021/04/16 12:22:53 UTC

J2000 position of star is 20:29:22.0 -18:24:46
Equinox of date position of star is 20:30:34.1 -18:20:29
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 130 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=21.9

TNO is 40.0 AU from the Sun and 40.2 AU from the Earth.
The TNO is moving 9.9 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 264 seconds.
The 1-sigma cross-track error in the shadow position is 1913 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=440.6 km assuming a 5% albedo -- 44.3 sec chord
Diameter=179.9 km assuming a 30% albedo -- 18.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 523712, (2021/04/16 12:23UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:49.4 -29:30:32  1.2 35.49 100
38Zet Sgr      19:03:57.9 -29:50:52  2.7 22.81 150
10Pi Cap       20:28:32.2 -18:08:26  5.2  0.53 130
12Omi Cap      20:31:05.7 -18:30:52  7.1  0.21 129
PPM 237501     20:30:46.1 -18:08:52  9.7  0.20 129
523712         20:30:35.0 -18:20:26 16.8       129
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 523712, (2021/04/16 12:23UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 35.49 100
38Zet Sgr      19:02:36.7 -29:52:49  2.7 22.81 150
10Pi Cap       20:27:19.2 -18:12:43  5.2  0.53 130
12Omi Cap      20:29:52.7 -18:35:13  7.1  0.21 129
PPM 237501     20:29:33.2 -18:13:12  9.7  0.20 129
523712         20:29:22.0 -18:24:46 16.8       129
Positions are for J2000

Event circumstances last updated at 2021/01/20 20:31:30 UT

Marc W. Buie, Southwest Research Institute

RECON