RECON: TNO occultation with 168700

Event between (168700) 00GE147 and star GA0700:10657497 with event index number of 1966877

Geocentric closest approach at 2028/04/01 19:49:42 UTC

J2000 position of star is 17:26:09.3 -18:20:28
Equinox of date position of star is 17:27:35.2 -18:21:38
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 169 degrees from the moon. Moon is 39% illuminated.
Apparent brightness V=23.5

Object is 33.0 AU from the Sun and 32.6 AU from the Earth.
Apparent velocity is 4.9 km/sec on the sky relative to the star, or, 0.7 arcsec/hr.
The 1-sigma error in the time of the event is 4650 seconds.
The 1-sigma cross-track error in the shadow position is 2781 km.

The object has an absolute magnitude Hv=8.2
Diameter=131.8 km assuming a 5% albedo -- 27.4 sec chord
Diameter=53.8 km assuming a 30% albedo -- 11.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 168700, (2028/04/01 19:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:08.7 -26:29:32  0.9 15.39 159
35Eta Oph      17:12:00.0 -15:45:28  2.6  4.59 164
PPM 233026     17:26:16.4 -18:28:10  6.4  0.38 169
PPM 233074     17:28:21.1 -18:16:46  9.5  0.15 169
168700         17:27:48.6 -18:21:49 16.3       169
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, (2028/04/01 19:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.39 159
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.59 164
PPM 233026     17:24:37.1 -18:26:45  6.4  0.38 169
PPM 233074     17:26:41.9 -18:15:26  9.5  0.15 169
168700         17:26:09.3 -18:20:28 16.3       169
Positions are for J2000

Event circumstances last updated at 2024/06/09 03:19:23 UT

Marc W. Buie, Southwest Research Institute

RECON