RECON: TNO occultation with 14YJ50

Event between 14YJ50 and star UC4-575-043797 with event index number of 141861

Geocentric closest approach at 2018/02/25 14:03:02 UTC

J2000 position of star is 08:47:30.7 +24:51:33
Equinox of date position of star is 08:48:32.1 +24:47:40
Stellar brightness R=15.1, use SENSEUP=128
Star is 33 degrees from the moon. Moon is 75% illuminated.
TNO apparent brightness V=22.2

TNO is 35.3 AU from the Sun and 34.4 AU from the Earth.
The TNO is moving 21.4 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 568 seconds.
The 1-sigma cross-track error in the shadow position is 4898 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=271.7 km assuming a 5% albedo -- 12.7 sec chord
Diameter=110.9 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 14YJ50, (2018/02/25 14:03UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:25.5 +27:58:51  1.1 14.27  19
69Nu Cnc       09:03:47.7 +24:22:49  5.4  3.48  36
PPM 099056     08:49:39.0 +24:03:39  8.5  0.77  33
PPM 099055     08:49:36.7 +25:00:27  9.7  0.32  33
PPM 099052     08:49:17.9 +24:47:50 11.5  0.16  33
14YJ50         08:48:34.8 +24:47:29 15.1        33
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 14YJ50, (2018/02/25 14:03UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 14.27  19
69Nu Cnc       09:02:44.2 +24:27:10  5.4  3.48  36
PPM 099056     08:48:35.2 +24:07:43  8.5  0.77  33
PPM 099055     08:48:32.5 +25:04:32  9.7  0.32  33
PPM 099052     08:48:13.8 +24:51:54 11.5  0.16  33
14YJ50         08:47:30.7 +24:51:33 15.1        33
Positions are for J2000

Event circumstances last updated at 2017/05/17 18:02:49 UT

Marc W. Buie, Southwest Research Institute

RECON