RECON: TNO occultation with 168700

Event between (168700) 00GE147 and star GA0720:06638573 with event index number of 1966243

Geocentric closest approach at 2024/02/12 05:56:05 UTC

J2000 position of star is 16:50:25.5 -17:32:15
Equinox of date position of star is 16:51:49.4 -17:34:38
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 102 degrees from the moon. Moon is 8% illuminated.
Apparent brightness V=23.5

Object is 32.2 AU from the Sun and 32.5 AU from the Earth.
Apparent velocity is 16.7 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 782 seconds.
The 1-sigma cross-track error in the shadow position is 2208 km.

The object has an absolute magnitude Hv=8.2
Diameter=131.8 km assuming a 5% albedo -- 8.1 sec chord
Diameter=53.8 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 168700, (2024/02/12 05:56UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:53.4 -26:29:00  0.9 10.14 105
35Eta Oph      17:11:45.8 -15:45:11  2.6  5.11  98
PPM 232348     16:57:25.5 -16:50:33  6.3  1.53 101
PPM 232237     16:52:48.1 -17:58:46  8.3  0.46 102
PPM 232223     16:52:07.3 -17:13:17  9.5  0.36 102
168700         16:51:49.4 -17:34:38 16.4       102
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, (2024/02/12 05:56UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.14 105
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.11  98
PPM 232348     16:56:02.0 -16:48:22  6.3  1.53 101
PPM 232237     16:51:23.9 -17:56:25  8.3  0.46 102
PPM 232223     16:50:43.6 -17:10:55  9.5  0.36 102
168700         16:50:25.5 -17:32:15 16.4       102
Positions are for J2000

Event circumstances last updated at 2024/02/12 04:17:01 UT

Marc W. Buie, Southwest Research Institute

RECON