RECON: TNO occultation with 523800

Event between (523800) 17KZ31 and star GA0960:03615098 with event index number of 1059205

Geocentric closest approach at 2021/03/06 19:50:07 UTC

J2000 position of star is 10:12:07.4 +07:55:54
Equinox of date position of star is 10:13:13.9 +07:49:38
Stellar brightness G=12.8, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 114 degrees from the moon. Moon is 42% illuminated.
TNO apparent brightness V=21.5

TNO is 13.0 AU from the Sun and 12.1 AU from the Earth.
The TNO is moving 39.0 km/sec on the sky relative to the star, or, 16.0 arcsec/hr.
The 1-sigma error in the time of the event is 20 seconds.
The 1-sigma cross-track error in the shadow position is 735 km.

The TNO has an absolute magnitude Hv=10.4
Diameter=51.3 km assuming a 5% albedo -- 1.3 sec chord
Diameter=20.9 km assuming a 30% albedo -- 0.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523800, (2021/03/06 19:50UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:29.9 +11:51:46  1.3  4.14 116
31 Leo         10:09:01.6 +09:53:34  6.0  2.31 116
PPM 156627     10:14:37.2 +09:04:50  8.0  1.30 114
PPM 156610     10:13:43.0 +07:34:19  8.8  0.28 114
523800         10:13:14.3 +07:49:36 12.8       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 523800, (2021/03/06 19:50UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  4.14 116
31 Leo         10:07:54.2 +09:59:50  6.0  2.31 116
PPM 156627     10:13:30.0 +09:11:10  8.0  1.30 114
PPM 156610     10:12:36.2 +07:40:38  8.8  0.28 114
523800         10:12:07.4 +07:55:54 12.8       114
Positions are for J2000

Event circumstances last updated at 2021/01/22 20:43:59 UT

Marc W. Buie, Southwest Research Institute

RECON