RECON: TNO occultation with 03LD9

Event between 03LD9 and star GA0700:20914066 with event index number of 1662029

Geocentric closest approach at 2020/07/30 23:47:56 UTC

J2000 position of star is 18:08:25.2 -19:17:51
Equinox of date position of star is 18:09:35.7 -19:17:36
Stellar brightness G=15.7, use SENSEUP=128
Star is 10 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=23.0

TNO is 42.8 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 18.9 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 702 seconds.
The 1-sigma cross-track error in the shadow position is 2110 km.

The TNO has an absolute magnitude Hv=6.6
Diameter=295.1 km assuming a 5% albedo -- 15.6 sec chord
Diameter=120.5 km assuming a 30% albedo -- 6.4 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 03LD9, (2020/07/30 23:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.4 -26:28:33  0.9 23.85  14
Nunki          18:56:32.4 -26:16:10  2.0 12.86  20
PPM 234244     18:16:43.4 -18:39:13  6.1  1.79  11
PPM 234046     18:07:55.5 -18:58:50  8.4  0.51   9
PPM 234084     18:09:53.4 -19:22:54  9.0  0.11  10
03LD9          18:09:38.1 -19:17:35 15.7        10
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, (2020/07/30 23:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.85  14
Nunki          18:55:15.9 -26:17:49  2.0 12.86  20
PPM 234244     18:15:30.8 -18:39:42  6.1  1.79  11
PPM 234046     18:06:42.8 -18:59:03  8.4  0.51   9
PPM 234084     18:08:40.4 -19:23:10  9.0  0.11  10
03LD9          18:08:25.2 -19:17:51 15.7        10
Positions are for J2000

Event circumstances last updated at 2019/12/01 22:54:05 UT

Marc W. Buie, Southwest Research Institute

RECON