RECON: TNO occultation with 05LB54

Event between 05LB54 and star GA0660:15276760 with event index number of 294149

Geocentric closest approach at 2020/02/22 15:08:36 UTC

J2000 position of star is 17:35:42.6 -22:39:11
Equinox of date position of star is 17:36:51.3 -22:39:50
Stellar brightness G=13.2, use SENSEUP=32
Star is 58 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=22.3

TNO is 41.7 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 16.0 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 1244 seconds.
The 1-sigma cross-track error in the shadow position is 3335 km.

The TNO has an absolute magnitude Hv=5.9
Diameter=390.9 km assuming a 5% albedo -- 24.4 sec chord
Diameter=159.6 km assuming a 30% albedo -- 10.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 05LB54, (2020/02/22 15:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:38.7 -26:28:30  0.9 15.53  72
35Eta Oph      17:11:32.1 -15:44:55  2.6  9.15  65
PPM 267109     17:39:57.6 -21:55:22  6.4  1.02  57
PPM 267094     17:39:16.9 -22:35:33  8.4  0.55  57
PPM 267043     17:36:46.0 -22:34:37  9.3  0.10  58
05LB54         17:36:55.8 -22:39:53 13.2        58
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 05LB54, (2020/02/22 15:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.53  72
35Eta Oph      17:10:22.7 -15:43:29  2.6  9.15  65
PPM 267109     17:38:44.8 -21:54:46  6.4  1.02  57
PPM 267094     17:38:03.8 -22:34:55  8.4  0.55  57
PPM 267043     17:35:32.9 -22:33:55  9.3  0.10  58
05LB54         17:35:42.6 -22:39:11 13.2        58
Positions are for J2000

Event circumstances last updated at 2018/11/29 20:33:05 UT

Marc W. Buie, Southwest Research Institute

RECON