RECON: TNO occultation with 03LD9

Event between 03LD9 and star GA0700:22301863 with event index number of 1662260

Geocentric closest approach at 2021/05/14 15:10:03 UTC

J2000 position of star is 18:19:57.5 -19:07:53
Equinox of date position of star is 18:21:12.8 -19:07:15
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 169 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=23.0

TNO is 42.9 AU from the Sun and 42.1 AU from the Earth.
The TNO is moving 17.4 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 866 seconds.
The 1-sigma cross-track error in the shadow position is 2581 km.

The TNO has an absolute magnitude Hv=6.6
Diameter=295.1 km assuming a 5% albedo -- 16.9 sec chord
Diameter=120.5 km assuming a 30% albedo -- 6.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 03LD9, (2021/05/14 15:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.3 -26:28:39  0.9 26.45 165
Nunki          18:56:35.3 -26:16:06  2.0 10.84 162
PPM 234421     18:22:38.4 -18:50:55  5.9  0.43 168
PPM 234409     18:22:17.4 -19:38:48  8.3  0.58 169
PPM 234422     18:22:41.3 -19:15:39  8.6  0.37 168
03LD9          18:21:13.1 -19:07:14 16.0       168
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 03LD9, (2021/05/14 15:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 26.45 165
Nunki          18:55:15.9 -26:17:49  2.0 10.84 162
PPM 234421     18:21:23.0 -18:51:36  5.9  0.43 168
PPM 234409     18:21:01.5 -19:39:28  8.3  0.58 169
PPM 234422     18:21:25.6 -19:16:20  8.6  0.37 168
03LD9          18:19:57.5 -19:07:53 16.0       169
Positions are for J2000

Event circumstances last updated at 2021/04/18 22:55:59 UT

Marc W. Buie, Southwest Research Institute

RECON