RECON: TNO occultation with 05LB54

Event between 05LB54 and star GA0660:14638458 with event index number of 1941304

Geocentric closest approach at 2021/08/13 19:48:29 UTC

J2000 position of star is 17:33:54.0 -22:43:31
Equinox of date position of star is 17:35:11.6 -22:44:19
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 57 degrees from the moon. Moon is 30% illuminated.
TNO apparent brightness V=22.0

TNO is 41.6 AU from the Sun and 41.1 AU from the Earth.
The TNO is moving 11.0 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 895 seconds.
The 1-sigma cross-track error in the shadow position is 2098 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=430.5 km assuming a 5% albedo -- 39.0 sec chord
Diameter=175.8 km assuming a 30% albedo -- 15.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 05LB54, (2021/08/13 19:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:44.2 -26:28:41  0.9 15.11  43
35Eta Oph      17:11:37.2 -15:45:01  2.6  8.93  50
51 Oph         17:32:44.2 -23:58:39  4.8  1.36  56
PPM 267002     17:34:52.7 -22:11:07  7.5  0.56  56
PPM 267001     17:34:51.6 -22:39:43  9.2  0.11  56
05LB54         17:35:12.4 -22:44:19 16.0        57
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, (2021/08/13 19:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.11  43
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.93  50
51 Oph         17:31:25.0 -23:57:46  4.8  1.36  56
PPM 267002     17:33:34.6 -22:10:18  7.5  0.56  56
PPM 267001     17:33:33.1 -22:38:54  9.2  0.11  56
05LB54         17:33:54.0 -22:43:31 16.0        56
Positions are for J2000

Event circumstances last updated at 2021/05/18 00:34:18 UT

Marc W. Buie, Southwest Research Institute

RECON