RECON: TNO occultation with 523705

Event between (523705) 14HE200 and star GA0700:06183846 with event index number of 2620407

Geocentric closest approach at 2027/02/11 15:55:22 UTC

J2000 position of star is 16:07:05.4 -19:09:29
Equinox of date position of star is 16:08:30.7 -19:13:19
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 136 degrees from the moon. Moon is 23% illuminated.
Apparent brightness V=22.0

Object is 34.9 AU from the Sun and 35.0 AU from the Earth.
Apparent velocity is 12.0 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 223 seconds.
The 1-sigma cross-track error in the shadow position is 1566 km.

The object has an absolute magnitude Hv=6.4
Diameter=302.0 km assuming a 5% albedo -- 26.4 sec chord
Diameter=123.3 km assuming a 30% albedo -- 10.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 523705, (2027/02/11 15:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:04.5 -26:29:23  0.9  8.91 130
8Bet1Sco       16:07:01.1 -19:52:39  2.6  0.76 136
8Bet2Sco       16:07:01.5 -19:52:25  5.1  0.75 136
PPM 231163     16:06:22.4 -19:13:48  8.3  0.54 136
PPM 231244     16:09:18.0 -19:01:15  9.5  0.26 136
523705         16:08:39.9 -19:13:44 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 523705, (2027/02/11 15:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  8.91 130
8Bet1Sco       16:05:26.2 -19:48:20  2.6  0.76 136
8Bet2Sco       16:05:26.7 -19:48:07  5.1  0.75 136
PPM 231163     16:04:47.9 -19:09:28  8.3  0.54 136
PPM 231244     16:07:43.6 -18:57:01  9.5  0.26 136
523705         16:07:05.4 -19:09:29 15.0       136
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:26:52 UT

Marc W. Buie, Southwest Research Institute

RECON