RECON: TNO occultation with 168703

Event between (168703) 00GP183 and star GA0660:06850745 with event index number of 1965640

Geocentric closest approach at 2022/09/19 06:29:07 UTC

J2000 position of star is 15:57:01.1 -23:38:24
Equinox of date position of star is 15:58:19.1 -23:42:06
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon. Moon is 37% illuminated.
TNO apparent brightness V=21.9

TNO is 36.8 AU from the Sun and 37.2 AU from the Earth.
The TNO is moving 17.6 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 96 seconds.
The 1-sigma cross-track error in the shadow position is 1422 km.

The TNO has an absolute magnitude Hv=6.1
Diameter=368.1 km assuming a 5% albedo -- 20.9 sec chord
Diameter=150.3 km assuming a 30% albedo -- 8.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 168703, (2022/09/19 06:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:48.2 -26:28:50  0.9  7.85 149
7Del Sco       16:01:40.8 -22:41:04  2.3  1.27 141
PPM 264830     15:55:17.3 -24:02:39  5.4  0.78 140
PPM 264924     15:59:10.1 -23:35:29  7.1  0.21 141
168703         15:58:22.5 -23:42:15 16.3       141
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 168703, (2022/09/19 06:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.85 149
7Del Sco       16:00:20.0 -22:37:18  2.3  1.27 141
PPM 264830     15:53:55.9 -23:58:42  5.4  0.78 140
PPM 264924     15:57:48.8 -23:31:39  7.1  0.21 141
168703         15:57:01.1 -23:38:24 16.3       141
Positions are for J2000

Event circumstances last updated at 2021/10/09 01:02:28 UT

Marc W. Buie, Southwest Research Institute

RECON