RECON: TNO occultation with 535022

Event between (535022) 14WN509 and star GA0900:03709886 with event index number of 2261739

Geocentric closest approach at 2022/03/03 23:50:16 UTC

J2000 position of star is 10:50:32.4 +00:06:29
Equinox of date position of star is 10:51:39.9 -00:00:31
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 161 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=22.3

TNO is 41.2 AU from the Sun and 40.2 AU from the Earth.
The TNO is moving 25.4 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 184 seconds.
The 1-sigma cross-track error in the shadow position is 3135 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 13.7 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 535022, (2022/03/03 23:50UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:33.0 +11:51:29  1.3 15.82 150
55 Leo         10:56:50.8 +00:37:06  6.2  1.44 163
PPM 178316     10:53:44.2 -00:19:12  7.4  0.60 162
PPM 157304     10:54:00.4 +00:02:18  9.6  0.58 162
PPM 157246     10:51:22.1 +00:14:11 11.0  0.26 161
535022         10:51:40.6 -00:00:35 14.1       161
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 535022, (2022/03/03 23:50UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 15.82 150
55 Leo         10:55:42.5 +00:44:13  6.2  1.44 163
PPM 178316     10:52:36.1 -00:12:06  7.4  0.60 162
PPM 157304     10:52:52.2 +00:09:24  9.6  0.58 162
PPM 157246     10:50:13.9 +00:21:16 11.0  0.26 161
535022         10:50:32.4 +00:06:29 14.1       161
Positions are for J2000

Event circumstances last updated at 2021/12/06 01:47:26 UT

Marc W. Buie, Southwest Research Institute

RECON