RECON: TNO occultation with 168700

Event between (168700) 00GE147 and star GA0740:05753978 with event index number of 261778

Geocentric closest approach at 2019/05/16 18:41:46 UTC

J2000 position of star is 16:02:12.3 -15:26:09
Equinox of date position of star is 16:03:17.2 -15:29:17
Stellar brightness G=16.7, use SENSEUP=128
Star is 33 degrees from the moon. Moon is 94% illuminated.
TNO apparent brightness V=23.2

TNO is 31.5 AU from the Sun and 30.5 AU from the Earth.
The TNO is moving 23.4 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 262 seconds.
The 1-sigma cross-track error in the shadow position is 1831 km.

The TNO has an absolute magnitude Hv=8.3
Diameter=131.8 km assuming a 5% albedo -- 5.6 sec chord
Diameter=53.8 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 168700, (2019/05/16 18:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.9 -26:28:24  0.9 12.69  42
8Bet1Sco       16:06:34.0 -19:51:25  2.6  4.44  35
49 Lib         16:01:25.0 -16:35:20  5.5  1.19  33
PPM 231136     16:04:39.9 -16:27:16  8.2  1.02  34
PPM 231109     16:03:42.4 -15:31:28  9.7  0.10  33
168700         16:03:18.1 -15:29:19 16.7        33
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 168700, (2019/05/16 18:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.69  42
8Bet1Sco       16:05:26.2 -19:48:20  2.6  4.44  35
49 Lib         16:00:18.8 -16:32:08  5.5  1.19  33
PPM 231136     16:03:33.7 -16:24:08  8.2  1.02  34
PPM 231109     16:02:36.5 -15:28:19  9.7  0.10  33
168700         16:02:12.3 -15:26:09 16.7        33
Positions are for J2000

Event circumstances last updated at 2019/02/12 07:51:41 UT

Marc W. Buie, Southwest Research Institute

RECON