RECON: TNO occultation with 363401

Event between (363401) 03LB7 and star GA0640:18224799 with event index number of 1776864

Geocentric closest approach at 2027/09/28 09:32:21 UTC

J2000 position of star is 17:41:04.7 -24:45:36
Equinox of date position of star is 17:42:35.0 -24:46:15
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 104 degrees from the moon. Moon is 4% illuminated.
Apparent brightness V=23.1

Object is 42.1 AU from the Sun and 42.3 AU from the Earth.
Apparent velocity is 9.9 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 1311 seconds.
The 1-sigma cross-track error in the shadow position is 5027 km.

The object has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 27.8 sec chord
Diameter=112.4 km assuming a 30% albedo -- 11.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 363401, (2027/09/28 09:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.8 -26:29:28  0.9 16.23  88
35Eta Oph      17:11:58.3 -15:45:26  2.6 11.55  97
51 Oph         17:33:06.6 -23:58:54  4.8  2.34 102
PPM 267136     17:42:31.5 -23:50:55  8.2  0.93 104
PPM 267145     17:42:56.1 -24:26:35  9.5  0.33 104
363401         17:42:47.0 -24:46:20 16.7       104
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, (2027/09/28 09:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.23  88
35Eta Oph      17:10:22.7 -15:43:29  2.6 11.55  97
51 Oph         17:31:25.0 -23:57:46  4.8  2.34 102
PPM 267136     17:40:49.9 -23:50:10  8.2  0.93 104
PPM 267145     17:41:14.0 -24:25:52  9.5  0.33 104
363401         17:41:04.7 -24:45:36 16.7       104
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:28:37 UT

Marc W. Buie, Southwest Research Institute

RECON