RECON: TNO occultation with 552678

Event between (552678) 10JG210 and star GA0880:05357185 with event index number of 2222162

Geocentric closest approach at 2022/08/16 16:58:07 UTC

J2000 position of star is 17:13:52.1 -00:53:57
Equinox of date position of star is 17:14:59.5 -00:55:23
Stellar brightness G=14.4, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 125 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=21.6

TNO is 18.9 AU from the Sun and 18.5 AU from the Earth.
The TNO is moving 12.9 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 55 seconds.
The 1-sigma cross-track error in the shadow position is 765 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=113.2 km assuming a 5% albedo -- 8.9 sec chord
Diameter=46.2 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 552678, (2022/08/16 16:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.9 -26:28:49  0.9 27.68 135
60Bet Oph      17:44:35.5 +04:33:34  2.8  9.20 117
PPM 180004     17:09:23.7 -01:06:27  6.5  1.42 126
PPM 180014     17:13:32.5 -00:47:59  8.4  0.39 125
PPM 180015     17:13:42.9 -01:02:13  8.9  0.35 125
PPM 180018     17:15:36.3 -00:43:58 10.1  0.24 125
552678         17:15:02.1 -00:55:26 14.4       125
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 552678, (2022/08/16 16:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 27.68 135
60Bet Oph      17:43:28.3 +04:34:06  2.8  9.20 117
PPM 180004     17:08:13.6 -01:04:47  6.5  1.42 126
PPM 180014     17:12:22.5 -00:46:27  8.4  0.39 125
PPM 180015     17:12:32.8 -01:00:41  8.9  0.35 125
PPM 180018     17:14:26.3 -00:42:30 10.1  0.24 125
552678         17:13:52.1 -00:53:57 14.4       125
Positions are for J2000

Event circumstances last updated at 2021/10/14 01:43:29 UT

Marc W. Buie, Southwest Research Institute

RECON