RECON: TNO occultation with 14YG50

Event between 14YG50 and star UC4-584-038566 with event index number of 241867

Geocentric closest approach at 2018/02/12 12:58:13 UTC

J2000 position of star is 07:26:49.8 +26:43:38
Equinox of date position of star is 07:27:56.5 +26:41:24
Stellar brightness R=16.5, use SENSEUP=128
Star is 172 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=22.4

TNO is 34.3 AU from the Sun and 33.4 AU from the Earth.
The TNO is moving 20.3 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 286 seconds.
The 1-sigma cross-track error in the shadow position is 1609 km.

The TNO has an absolute magnitude Hv=7.0
Diameter=235.5 km assuming a 5% albedo -- 11.6 sec chord
Diameter=96.1 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 14YG50, (2018/02/12 12:58UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:25.3 +27:58:52  1.1  4.30 169
59 Gem         07:25:40.9 +27:36:05  6.0  1.04 172
PPM 097535     07:29:07.7 +26:11:22  7.5  0.57 173
PPM 097493     07:26:53.5 +26:35:28  9.9  0.26 173
14YG50         07:27:56.8 +26:41:23 16.5       172
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 14YG50, (2018/02/12 12:58UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1  4.30 169
59 Gem         07:24:33.4 +27:38:16  6.0  1.04 172
PPM 097535     07:28:00.9 +26:13:39  7.5  0.57 173
PPM 097493     07:25:46.5 +26:37:41  9.9  0.26 173
14YG50         07:26:49.8 +26:43:38 16.5       172
Positions are for J2000

Event circumstances last updated at 2018/01/16 17:03:08 UT

Marc W. Buie, Southwest Research Institute

RECON