RECON: TNO occultation with 168700

Event between (168700) 00GE147 and star GA0720:06421116 with event index number of 1966186

Geocentric closest approach at 2023/04/24 06:14:45 UTC

J2000 position of star is 16:41:09.1 -17:03:30
Equinox of date position of star is 16:42:29.8 -17:06:06
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 165 degrees from the moon. Moon is 18% illuminated.
Apparent brightness V=23.3

Object is 32.1 AU from the Sun and 31.3 AU from the Earth.
Apparent velocity is 17.6 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 635 seconds.
The 1-sigma cross-track error in the shadow position is 2236 km.

The object has an absolute magnitude Hv=8.2
Diameter=131.8 km assuming a 5% albedo -- 7.7 sec chord
Diameter=53.8 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 168700, (2023/04/24 06:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.4 -26:28:54  0.9  9.76 166
13Zet Oph      16:38:26.7 -10:36:45  2.6  6.56 159
PPM 232030     16:42:55.4 -17:47:07  5.0  0.69 165
PPM 232029     16:42:54.9 -16:58:36  8.4  0.16 165
168700         16:42:29.8 -17:06:06 14.0       165
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, (2023/04/24 06:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.76 166
13Zet Oph      16:37:09.6 -10:34:01  2.6  6.56 159
PPM 232030     16:41:34.4 -17:44:32  5.0  0.69 165
PPM 232029     16:41:34.3 -16:56:01  8.4  0.16 165
168700         16:41:09.1 -17:03:30 14.0       165
Positions are for J2000

Event circumstances last updated at 2023/04/19 02:32:47 UT

Marc W. Buie, Southwest Research Institute

RECON