RECON: TNO occultation with 05LA54

Event between 05LA54 and star GA0640:16327483 with event index number of 276583

Geocentric closest approach at 2020/04/18 06:55:04 UTC

J2000 position of star is 17:30:20.2 -24:52:20
Equinox of date position of star is 17:31:30.0 -24:53:08
Stellar brightness G=15.9, use SENSEUP=128
Star is 73 degrees from the moon. Moon is 20% illuminated.
TNO apparent brightness V=23.0

TNO is 41.4 AU from the Sun and 40.8 AU from the Earth.
The TNO is moving 12.0 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 1397 seconds.
The 1-sigma cross-track error in the shadow position is 5264 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=271.7 km assuming a 5% albedo -- 22.6 sec chord
Diameter=110.9 km assuming a 30% albedo -- 9.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 05LA54, (2020/04/18 06:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.3 -26:28:31  0.9 13.81  86
35Eta Oph      17:11:32.6 -15:44:55  2.6 10.27  79
51 Oph         17:32:39.4 -23:58:36  4.8  0.94  73
PPM 266921     17:30:14.8 -24:21:05  8.5  0.62  73
PPM 266919     17:30:11.2 -24:45:50  9.5  0.34  73
05LA54         17:31:35.1 -24:53:11 15.9        73
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 05LA54, (2020/04/18 06:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.81  86
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.27  79
51 Oph         17:31:25.0 -23:57:46  4.8  0.94  73
PPM 266921     17:29:00.2 -24:20:12  8.5  0.62  73
PPM 266919     17:28:56.4 -24:44:56  9.5  0.34  73
05LA54         17:30:20.2 -24:52:20 15.9        73
Positions are for J2000

Event circumstances last updated at 2018/11/29 20:34:02 UT

Marc W. Buie, Southwest Research Institute

RECON