RECON: TNO occultation with 05UN524

Event between 05UN524 and star UC4-649-041874 with event index number of 174727

Geocentric closest approach at 2019/01/17 15:13:45 UTC

J2000 position of star is 06:57:08.9 +39:39:51
Equinox of date position of star is 06:58:21.0 +39:38:24
Stellar brightness R=15.3, use SENSEUP=128
Star is 39 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=22.1

TNO is 18.8 AU from the Sun and 17.9 AU from the Earth.
The TNO is moving 22.0 km/sec on the sky relative to the star, or, 6.1 arcsec/hr.
The 1-sigma error in the time of the event is 400 seconds.
The 1-sigma cross-track error in the shadow position is 888 km.

The TNO has an absolute magnitude Hv=9.3
Diameter=84.3 km assuming a 5% albedo -- 3.8 sec chord
Diameter=34.4 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 05UN524, (2019/01/17 15:14UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.8 +27:58:43  1.1 15.31  46
34Bet Aur      06:00:55.6 +44:56:50  1.9 11.87  33
59 Aur         06:54:19.9 +38:50:40  6.4  1.13  38
PPM 072242     06:57:09.8 +39:31:38  8.3  0.27  39
PPM 072260     06:58:21.2 +39:49:58  9.1  0.20  39
05UN524        06:58:27.9 +39:38:16 15.3        39
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 05UN524, (2019/01/17 15:14UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 15.31  46
34Bet Aur      05:59:31.6 +44:56:51  1.9 11.87  33
59 Aur         06:53:01.4 +38:52:09  6.4  1.13  38
PPM 072242     06:55:50.8 +39:33:11  8.3  0.27  39
PPM 072260     06:57:02.1 +39:51:33  9.1  0.20  39
05UN524        06:57:08.9 +39:39:51 15.3        39
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:08:53 UT

Marc W. Buie, Southwest Research Institute

RECON