RECON: TNO occultation with 523719

Event between (523719) 14LM28 and star GA1300:04725591 with event index number of 1098110

Geocentric closest approach at 2021/04/14 14:26:45 UTC

J2000 position of star is 17:41:53.4 +40:34:43
Equinox of date position of star is 17:42:34.1 +40:34:10
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 114 degrees from the moon. Moon is 6% illuminated.
TNO apparent brightness V=22.6

TNO is 17.5 AU from the Sun and 17.3 AU from the Earth.
The TNO is moving 34.5 km/sec on the sky relative to the star, or, 9.9 arcsec/hr.
The 1-sigma error in the time of the event is 66 seconds.
The 1-sigma cross-track error in the shadow position is 1373 km.

The TNO has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 1.8 sec chord
Diameter=25.8 km assuming a 30% albedo -- 0.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523719, (2021/04/14 14:27UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:39.6 +38:48:16  0.0 10.73 108
Etamin         17:57:06.1 +51:29:14  2.2 11.20 104
PPM 056289     17:33:47.8 +41:13:46  5.7  1.79 114
PPM 056413     17:42:36.0 +41:00:56  7.8  0.45 114
PPM 056400     17:41:24.5 +40:31:38 10.3  0.23 114
523719         17:42:34.5 +40:34:10 16.1       114
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 523719, (2021/04/14 14:27UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 10.73 108
Etamin         17:56:36.3 +51:29:20  2.2 11.20 104
PPM 056289     17:33:07.1 +41:14:35  5.7  1.79 114
PPM 056413     17:41:55.2 +41:01:29  7.8  0.45 114
PPM 056400     17:40:43.2 +40:32:14 10.3  0.23 114
523719         17:41:53.4 +40:34:43 16.1       114
Positions are for J2000

Event circumstances last updated at 2021/01/20 20:21:22 UT

Marc W. Buie, Southwest Research Institute

RECON