RECON: TNO occultation with 363401

Event between (363401) 03LB7 and star GA0640:12283696 with event index number of 1239594

Geocentric closest approach at 2022/07/03 03:15:40 UTC

J2000 position of star is 17:13:14.7 -24:11:29
Equinox of date position of star is 17:14:36.1 -24:12:58
Stellar brightness G=15.8, 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 14% illuminated.
TNO apparent brightness V=22.9

TNO is 41.6 AU from the Sun and 40.7 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 312 seconds.
The 1-sigma cross-track error in the shadow position is 1781 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 12.3 sec chord
Diameter=112.4 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 363401, (2022/07/03 03:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.4 -26:28:48  0.9 10.15 105
35Eta Oph      17:11:40.2 -15:45:04  2.6  8.49 112
PPM 266746     17:23:04.5 -24:55:37  6.5  2.05 116
PPM 266603     17:16:09.8 -24:05:04  8.4  0.38 114
PPM 266569     17:14:37.4 -24:02:37  9.7  0.17 114
363401         17:14:37.2 -24:12:59 15.8       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 363401, (2022/07/03 03:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.15 105
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.49 112
PPM 266746     17:21:41.5 -24:54:23  6.5  2.05 116
PPM 266603     17:14:47.4 -24:03:37  8.4  0.38 114
PPM 266569     17:13:15.1 -24:01:07  9.7  0.17 114
363401         17:13:14.7 -24:11:29 15.8       114
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:05:49 UT

Marc W. Buie, Southwest Research Institute

RECON