RECON: TNO occultation with 523717

Event between (523717) 14KY101 and star GA0680:11104735 with event index number of 2615965

Geocentric closest approach at 2022/05/20 23:08:23 UTC

J2000 position of star is 17:21:50.2 -20:24:39
Equinox of date position of star is 17:23:09.4 -20:25:51
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 46 degrees from the moon. Moon is 70% illuminated.
TNO apparent brightness V=21.9

TNO is 35.6 AU from the Sun and 34.7 AU from the Earth.
The TNO is moving 22.2 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 264 seconds.
The 1-sigma cross-track error in the shadow position is 1857 km.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 14.3 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523717, (2022/05/20 23:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.0 -26:28:47  0.9 13.44  56
35Eta Oph      17:11:39.8 -15:45:04  2.6  5.42  50
40Xi Oph       17:22:21.0 -21:08:06  3.9  0.73  46
PPM 266750     17:23:11.5 -20:35:23  7.2  0.16  46
PPM 266749     17:23:11.1 -20:26:17  9.9  0.01  46
523717         17:23:10.0 -20:25:52 17.0        45
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 523717, (2022/05/20 23:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.44  56
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.42  50
40Xi Oph       17:21:00.8 -21:06:51  3.9  0.73  46
PPM 266750     17:21:51.6 -20:34:10  7.2  0.16  46
PPM 266749     17:21:51.3 -20:25:04  9.9  0.01  46
523717         17:21:50.2 -20:24:39 17.0        46
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:02:33 UT

Marc W. Buie, Southwest Research Institute

RECON