RECON: TNO occultation with 15TK363

Event between 15TK363 and star GA0900:00221253 with event index number of 2669491

Geocentric closest approach at 2022/07/20 20:51:32 UTC

J2000 position of star is 02:39:31.9 +00:41:03
Equinox of date position of star is 02:40:39.0 +00:46:37
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 14 degrees from the moon. Moon is 47% illuminated.
TNO apparent brightness V=23.3

TNO is 40.2 AU from the Sun and 40.4 AU from the Earth.
The TNO is moving 12.1 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 658 seconds.
The 1-sigma cross-track error in the shadow position is 3831 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=187.9 km assuming a 5% albedo -- 19.0 sec chord
Diameter=76.7 km assuming a 30% albedo -- 7.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 15TK363, (2022/07/20 20:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:13.0 +16:33:10  0.8 32.74  39
68Omi Cet      02:20:29.2 -02:52:35  2.0  6.23  14
82Del Cet      02:40:38.4 +00:25:29  4.1  0.36  14
PPM 145818     02:42:39.8 +00:38:29  7.8  0.51  14
82Del Cet      02:40:38.4 +00:25:29  4.1  0.36  14
PPM 145782     02:40:31.8 +00:56:20 10.1  0.16  14
15TK363        02:40:41.4 +00:46:49 16.5        14
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 15TK363, (2022/07/20 20:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 32.74  39
68Omi Cet      02:19:20.8 -02:58:45  2.0  6.23  14
82Del Cet      02:39:29.0 +00:19:42  4.1  0.36  14
PPM 145818     02:41:30.3 +00:32:46  7.8  0.51  14
82Del Cet      02:39:29.0 +00:19:42  4.1  0.36  14
PPM 145782     02:39:22.1 +00:50:34 10.1  0.16  14
15TK363        02:39:31.9 +00:41:03 16.5        14
Positions are for J2000

Event circumstances last updated at 2021/10/08 00:58:05 UT

Marc W. Buie, Southwest Research Institute

RECON