RECON: TNO occultation with 168703

Event between (168703) 00GP183 and star GA0660:06668971 with event index number of 278161

Geocentric closest approach at 2020/07/14 11:24:22 UTC

J2000 position of star is 15:42:20.9 -22:43:58
Equinox of date position of star is 15:43:33.5 -22:47:49
Stellar brightness G=16.3, use SENSEUP=128
Star is 159 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=25.8

TNO is 36.8 AU from the Sun and 36.2 AU from the Earth.
The TNO is moving 12.3 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 205 seconds.
The 1-sigma cross-track error in the shadow position is 1541 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=380.2 km assuming a 5% albedo -- 4.9 sec chord
Diameter=155.2 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 168703, (2020/07/14 11:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.2 -26:28:33  0.9 11.31 148
7Del Sco       16:01:33.1 -22:40:43  2.3  4.15 156
PPM 264469     15:39:00.7 -23:12:30  5.8  1.12 160
PPM 264578     15:43:06.1 -23:20:12  8.1  0.55 159
PPM 264562     15:42:32.4 -22:44:45  9.6  0.24 159
168703         15:43:33.6 -22:47:49 16.3       159
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, (2020/07/14 11:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.31 148
7Del Sco       16:00:20.0 -22:37:18  2.3  4.15 156
PPM 264469     15:37:48.0 -23:08:32  5.8  1.12 160
PPM 264578     15:41:53.2 -23:16:20  8.1  0.55 159
PPM 264562     15:41:19.8 -22:40:52  9.6  0.24 159
168703         15:42:20.9 -22:43:58 16.3       159
Positions are for J2000

Event circumstances last updated at 2020/07/03 21:02:26 UT

Marc W. Buie, Southwest Research Institute

RECON