RECON: TNO occultation with 500880

Event between (500880) 13JJ64 and star GA0740:06058031 with event index number of 2453643

Geocentric closest approach at 2022/06/22 20:39:03 UTC

J2000 position of star is 16:29:06.5 -14:57:44
Equinox of date position of star is 16:30:20.7 -15:00:31
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 134 degrees from the moon. Moon is 33% illuminated.
TNO apparent brightness V=24.0

TNO is 45.8 AU from the Sun and 44.9 AU from the Earth.
The TNO is moving 22.6 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 336 seconds.
The 1-sigma cross-track error in the shadow position is 3284 km.

The TNO has an absolute magnitude Hv=7.4
Diameter=195.0 km assuming a 5% albedo -- 8.6 sec chord
Diameter=79.6 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 
 
 

Star training set for 500880, (2022/06/22 20:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.3 -26:28:48  0.9 11.47 132
13Zet Oph      16:38:23.9 -10:36:39  2.6  4.81 132
8Phi Oph       16:32:25.8 -16:39:36  4.0  1.72 133
PPM 231844     16:34:55.9 -15:04:02  8.5  1.10 133
PPM 231748     16:30:29.2 -14:57:55  9.4  0.05 134
500880         16:30:23.0 -15:00:36 16.2       134
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 500880, (2022/06/22 20:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.47 132
13Zet Oph      16:37:09.6 -10:34:01  2.6  4.81 132
8Phi Oph       16:31:08.3 -16:36:47  4.0  1.72 133
PPM 231844     16:33:39.3 -15:01:18  8.5  1.10 133
PPM 231748     16:29:12.7 -14:55:03  9.4  0.05 134
500880         16:29:06.5 -14:57:44 16.2       134
Positions are for J2000

Event circumstances last updated at 2021/10/13 01:34:42 UT

Marc W. Buie, Southwest Research Institute

RECON