RECON: TNO occultation with 363401

Event between (363401) 03LB7 and star GA0640:20926913 with event index number of 1909696

Geocentric closest approach at 2028/06/19 03:28:58 UTC

J2000 position of star is 17:51:19.5 -24:53:13
Equinox of date position of star is 17:52:50.0 -24:53:30
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 135 degrees from the moon. Moon is 15% illuminated.
Apparent brightness V=22.9

Object is 42.2 AU from the Sun and 41.2 AU from the Earth.
Apparent velocity is 24.6 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 659 seconds.
The 1-sigma cross-track error in the shadow position is 2065 km.

The object has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 11.1 sec chord
Diameter=112.4 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 363401, (2028/06/19 03:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.5 -26:29:33  0.9 18.51 154
34Ups Sco      17:32:42.1 -37:18:56  2.7 13.16 139
PPM 267497     17:56:39.3 -24:53:24  6.4  0.81 134
PPM 267390     17:52:14.8 -24:51:33  7.8  0.19 135
PPM 267398     17:52:47.2 -24:46:12  9.4  0.14 135
363401         17:53:04.7 -24:53:32 15.0       135
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, (2028/06/19 03:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.51 154
34Ups Sco      17:30:45.8 -37:17:46  2.7 13.16 139
PPM 267497     17:54:54.1 -24:53:13  6.4  0.81 134
PPM 267390     17:50:29.7 -24:51:11  7.8  0.19 135
PPM 267398     17:51:02.2 -24:45:52  9.4  0.14 135
363401         17:51:19.5 -24:53:13 15.0       135
Positions are for J2000

Event circumstances last updated at 2024/06/24 21:30:00 UT

Marc W. Buie, Southwest Research Institute

RECON