RECON: TNO occultation with 14YY49

Event between 14YY49 and star UC4-460-030460 with event index number of 161122

Geocentric closest approach at 2018/10/20 18:54:18 UTC

J2000 position of star is 07:11:50.6 +01:50:35
Equinox of date position of star is 07:12:46.5 +01:48:44
Stellar brightness R=15.6, use SENSEUP=128
Star is 124 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=23.0

TNO is 18.4 AU from the Sun and 18.3 AU from the Earth.
The TNO is moving 10.1 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 71 seconds.
The 1-sigma cross-track error in the shadow position is 2777 km.

The TNO has an absolute magnitude Hv=10.1
Diameter=58.3 km assuming a 5% albedo -- 5.8 sec chord
Diameter=23.8 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 14YY49, (2018/10/20 18:54UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:58.6 -16:44:34 -1.5 19.70 112
Alhena         06:38:47.9 +16:22:54  1.9 16.81 117
PPM 152385     07:20:21.3 +02:42:17  5.9  2.08 126
PPM 152051     07:10:28.4 +01:53:19  7.4  0.59 123
PPM 152117     07:12:20.3 +01:36:22  9.2  0.24 124
14YY49         07:12:49.2 +01:48:38 15.6       124
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 14YY49, (2018/10/20 18:54UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.2 -16:43:20 -1.5 19.70 112
Alhena         06:37:42.8 +16:23:57  1.9 16.81 117
PPM 152385     07:19:22.4 +02:44:26  5.9  2.08 126
PPM 152051     07:09:29.8 +01:55:13  7.4  0.59 123
PPM 152117     07:11:21.8 +01:38:18  9.2  0.24 124
14YY49         07:11:50.6 +01:50:35 15.6       124
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:00:29 UT

Marc W. Buie, Southwest Research Institute

RECON