RECON: TNO occultation with 14TZ85

Event between 14TZ85 and star UC4-605-042825 with event index number of 206584

Geocentric closest approach at 2019/02/08 21:11:15 UTC

J2000 position of star is 07:58:28.1 +30:57:28
Equinox of date position of star is 07:59:34.4 +30:54:33
Stellar brightness R=14.6, use SENSEUP=128
Star is 113 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=22.0

TNO is 54.1 AU from the Sun and 53.2 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 1133 seconds.
The 1-sigma cross-track error in the shadow position is 5841 km.

The TNO has an absolute magnitude Hv=4.6
Diameter=741.3 km assuming a 5% albedo -- 30.4 sec chord
Diameter=302.6 km assuming a 30% albedo -- 12.4 sec chord
Dynamical classification is 7:4EII
 
 
 
 
 
 
 
 

Star training set for 14TZ85, (2019/02/08 21:11UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:29.0 +27:58:43  1.1  4.10 110
PPM 073167     07:52:15.9 +33:11:03  6.0  2.77 111
PPM 073276     07:57:37.1 +31:38:36  8.1  0.86 112
PPM 073316     08:00:21.8 +30:40:01  9.2  0.28 113
PPM 073308     07:59:32.9 +30:56:43 10.7  0.05 113
14TZ85         07:59:40.1 +30:54:17 14.6       113
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 14TZ85, (2019/02/08 21:11UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1  4.10 110
PPM 073167     07:51:02.4 +33:14:02  6.0  2.77 111
PPM 073276     07:56:24.6 +31:41:43  8.1  0.86 112
PPM 073316     07:59:10.0 +30:43:12  9.2  0.28 113
PPM 073308     07:58:20.8 +30:59:53 10.7  0.05 113
14TZ85         07:58:28.1 +30:57:28 14.6       113
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:04:24 UT

Marc W. Buie, Southwest Research Institute

RECON