RECON: TNO occultation with 523688

Event between (523688) 14DK143 and star GA0800:05021313 with event index number of 1100084

Geocentric closest approach at 2021/04/03 05:46:54 UTC

J2000 position of star is 16:07:02.4 -09:40:50
Equinox of date position of star is 16:08:11.4 -09:44:08
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 30 degrees from the moon. Moon is 63% illuminated.
TNO apparent brightness V=22.1

TNO is 43.7 AU from the Sun and 43.0 AU from the Earth.
The TNO is moving 15.7 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 171 seconds.
The 1-sigma cross-track error in the shadow position is 1715 km.

The TNO has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 29.4 sec chord
Diameter=188.3 km assuming a 30% albedo -- 12.0 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 
 
 

Star training set for 523688, (2021/04/03 05:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:42.8 -26:28:38  0.9 17.57  19
1Del Oph       16:15:27.7 -03:44:51  2.7  6.25  32
15Psi Sco      16:13:09.9 -10:07:04  4.9  1.28  28
PPM 231210     16:07:45.7 -10:04:02  8.4  0.35  29
PPM 199311     16:08:21.5 -09:40:41  9.9  0.07  30
523688         16:08:12.1 -09:44:10 17.0        29
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 523688, (2021/04/03 05:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.57  19
1Del Oph       16:14:20.7 -03:41:43  2.7  6.25  32
15Psi Sco      16:12:00.0 -10:03:52  4.9  1.28  28
PPM 231210     16:06:35.9 -10:00:41  8.4  0.35  29
PPM 199311     16:07:11.9 -09:37:20  9.9  0.07  30
523688         16:07:02.4 -09:40:50 17.0        30
Positions are for J2000

Event circumstances last updated at 2021/01/19 21:42:12 UT

Marc W. Buie, Southwest Research Institute

RECON