RECON: TNO occultation with 01FK185

Event between 01FK185 and star GA0720:05363439 with event index number of 1064091

Geocentric closest approach at 2022/06/29 13:41:43 UTC

J2000 position of star is 15:00:05.9 -16:52:23
Equinox of date position of star is 15:01:20.6 -16:57:37
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 125 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=23.5

TNO is 41.5 AU from the Sun and 40.9 AU from the Earth.
The TNO is moving 14.1 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 474 seconds.
The 1-sigma cross-track error in the shadow position is 3663 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=223.9 km assuming a 5% albedo -- 15.8 sec chord
Diameter=91.4 km assuming a 30% albedo -- 6.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 01FK185, (2022/06/29 13:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.4 -26:28:48  0.9 22.80 147
27Bet Lib      15:18:13.2 -09:27:52  2.6  8.54 125
21Nu Lib       15:07:53.1 -16:20:34  5.2  1.68 126
PPM 229553     14:59:21.0 -17:27:11  6.9  0.69 124
PPM 229608     15:01:15.3 -16:57:09  9.3  0.03 125
01FK185        15:01:21.6 -16:57:41 15.8       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 01FK185, (2022/06/29 13:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.80 147
27Bet Lib      15:17:00.3 -09:22:59  2.6  8.54 125
21Nu Lib       15:06:37.6 -16:15:25  5.2  1.68 126
PPM 229553     14:58:05.2 -17:21:51  6.9  0.69 124
PPM 229608     14:59:59.7 -16:51:52  9.3  0.03 125
01FK185        15:00:05.9 -16:52:23 15.8       125
Positions are for J2000

Event circumstances last updated at 2022/03/13 02:14:32 UT

Marc W. Buie, Southwest Research Institute

RECON