RECON: TNO occultation with 13GY136

Event between 13GY136 and star GA0720:05626620 with event index number of 2054416

Geocentric closest approach at 2022/06/05 23:45:12 UTC

J2000 position of star is 15:40:31.9 -16:20:28
Equinox of date position of star is 15:41:44.6 -16:24:33
Stellar brightness G=12.5, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 90 degrees from the moon. Moon is 34% illuminated.
TNO apparent brightness V=23.0

TNO is 33.7 AU from the Sun and 32.7 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 141 seconds.
The 1-sigma cross-track error in the shadow position is 1329 km.

The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 7.9 sec chord
Diameter=70.9 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 13GY136, (2022/06/05 23:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.2 -26:28:47  0.9 15.19 103
8Bet1Sco       16:06:44.7 -19:51:54  2.6  6.86  96
44Eta Lib      15:45:20.3 -15:44:34  5.4  1.08  90
PPM 230630     15:44:02.3 -16:05:03  7.2  0.63  90
PPM 230586     15:42:12.7 -16:19:48  9.5  0.13  90
13GY136        15:41:48.1 -16:24:44 12.5        90
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 13GY136, (2022/06/05 23:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.19 103
8Bet1Sco       16:05:26.2 -19:48:20  2.6  6.86  96
44Eta Lib      15:44:04.4 -15:40:24  5.4  1.08  90
PPM 230630     15:42:46.2 -16:00:51  7.2  0.63  90
PPM 230586     15:40:56.5 -16:15:33  9.5  0.13  90
13GY136        15:40:31.9 -16:20:28 12.5        90
Positions are for J2000

Event circumstances last updated at 2021/05/23 23:11:15 UT

Marc W. Buie, Southwest Research Institute

RECON