RECON: TNO occultation with 13GF137

Event between 13GF137 and star GA0680:06036363 with event index number of 2052475

Geocentric closest approach at 2022/07/13 10:31:36 UTC

J2000 position of star is 14:54:15.0 -20:05:11
Equinox of date position of star is 14:55:30.8 -20:10:33
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 59 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=24.0

TNO is 38.7 AU from the Sun and 38.2 AU from the Earth.
The TNO is moving 8.3 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 898 seconds.
The 1-sigma cross-track error in the shadow position is 5434 km.

The TNO has an absolute magnitude Hv=8.0
Diameter=148.6 km assuming a 5% albedo -- 17.9 sec chord
Diameter=60.7 km assuming a 30% albedo -- 7.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 13GF137, (2022/07/13 10:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.6 -26:28:48  0.9 22.72  36
27Bet Lib      15:18:13.4 -09:27:53  2.6 12.03  58
PPM 229408     14:53:07.4 -18:26:49  6.2  1.82  60
PPM 229451     14:54:57.0 -20:03:49  7.9  0.18  59
13GF137        14:55:31.9 -20:10:38 14.9        59
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 13GF137, (2022/07/13 10:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.72  36
27Bet Lib      15:17:00.3 -09:22:59  2.6 12.03  58
PPM 229408     14:51:51.3 -18:21:19  6.2  1.82  60
PPM 229451     14:53:40.2 -19:58:22  7.9  0.18  59
13GF137        14:54:15.0 -20:05:11 14.9        59
Positions are for J2000

Event circumstances last updated at 2022/03/14 01:05:39 UT

Marc W. Buie, Southwest Research Institute

RECON