RECON: TNO occultation with 14GR53

Event between 14GR53 and star GA0600:08156706 with event index number of 1141087

Geocentric closest approach at 2021/04/03 21:12:28 UTC

J2000 position of star is 16:02:05.9 -29:55:47
Equinox of date position of star is 16:03:24.8 -29:59:13
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 34 degrees from the moon. Moon is 56% illuminated.
TNO apparent brightness V=21.9

TNO is 23.0 AU from the Sun and 22.4 AU from the Earth.
The TNO is moving 15.3 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 73 seconds.
The 1-sigma cross-track error in the shadow position is 1427 km.

The TNO has an absolute magnitude Hv=8.1
Diameter=143.2 km assuming a 5% albedo -- 9.3 sec chord
Diameter=58.5 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 
 
 

Star training set for 14GR53, (2021/04/03 21:12UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:42.8 -26:28:38  0.9  6.96  28
7Del Sco       16:01:35.6 -22:40:50  2.3  7.32  35
PPM 294547     16:02:40.3 -31:56:51  6.4  1.97  34
PPM 294590     16:04:22.5 -30:19:15  8.3  0.39  33
PPM 265021     16:03:23.4 -29:46:19  9.4  0.22  34
14GR53         16:03:25.5 -29:59:15 14.8        33
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 14GR53, (2021/04/03 21:12UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  6.96  28
7Del Sco       16:00:20.0 -22:37:18  2.3  7.32  35
PPM 294547     16:01:19.6 -31:53:21  6.4  1.97  34
PPM 294590     16:03:02.7 -30:15:48  8.3  0.39  33
PPM 265021     16:02:03.9 -29:42:50  9.4  0.22  34
14GR53         16:02:05.9 -29:55:47 14.8        34
Positions are for J2000

Event circumstances last updated at 2021/01/19 21:43:29 UT

Marc W. Buie, Southwest Research Institute

RECON