RECON: TNO occultation with 470027

Event between (470027) 06RC103 and star UC4-499-145280 with event index number of 147232

Geocentric closest approach at 2017/12/11 16:59:20 UTC

J2000 position of star is 23:22:12.1 +09:42:45
Equinox of date position of star is 23:23:02.7 +09:48:14
Stellar brightness R=16.1
Star is 160 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=21.7

TNO is 37.0 AU from the Sun and 36.9 AU from the Earth.
The TNO is moving 6.0 km/sec on the sky relative to the star, or, 0.8 arcsec/hr.
The 1-sigma error in the time of the event is 305 seconds.
The 1-sigma cross-track error in the shadow position is 1711 km.

The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 66.7 sec chord
Diameter=162.5 km assuming a 30% albedo -- 27.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 470027, (2017/12/11 16:59UT)
Object            RA         Dec     mag  sep  mel
Markab         23:05:39.4 +15:18:08  2.5  6.95 153
66 Peg         23:23:58.9 +12:24:46  6.3  2.61 159
PPM 173953     23:18:54.3 +09:36:06  8.3  1.06 159
PPM 174009     23:21:53.5 +09:44:47  9.0  0.31 160
PPM 174036     23:23:59.4 +09:52:07 11.1  0.22 160
470027         23:23:06.6 +09:48:39 16.1       160
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 470027, (2017/12/11 16:59UT)
Object            RA         Dec     mag  sep  mel
Markab         23:04:45.7 +15:12:18  2.5  6.95 153
66 Peg         23:23:04.6 +12:18:51  6.3  2.61 159
PPM 173953     23:17:59.9 +09:30:12  8.3  1.06 159
PPM 174009     23:20:59.0 +09:38:52  9.0  0.31 160
PPM 174036     23:23:04.8 +09:46:12 11.1  0.22 160
470027         23:22:12.1 +09:42:45 16.1       160
Positions are for J2000

Event circumstances last updated at 2016/09/01 18:18:08 UT

Marc W. Buie, Southwest Research Institute

RECON