RECON: TNO occultation with 05VZ122

Event between 05VZ122 and star UC4-525-015571 with event index number of 83853

Geocentric closest approach at 2017/10/21 21:13:22 UTC

J2000 position of star is 05:43:04.8 +14:59:51
Equinox of date position of star is 05:44:04.2 +15:00:16
Stellar brightness R=16.4, use SENSEUP=128
Star is 147 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=22.9

TNO is 35.3 AU from the Sun and 34.8 AU from the Earth.
The TNO is moving 12.1 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 2181 seconds.
The 1-sigma cross-track error in the shadow position is 5259 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=205.1 km assuming a 5% albedo -- 16.9 sec chord
Diameter=83.7 km assuming a 30% albedo -- 6.9 sec chord
Dynamical classification is 8:5EEE
 
 
 
 
 
 
 
 

Star training set for 05VZ122, (2017/10/21 21:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:08.2 +07:24:32  0.4  8.15 143
Bellatrix      05:26:05.2 +06:21:52  1.6  9.71 150
131 Tau        05:48:14.0 +14:29:37  5.7  1.12 146
PPM 121301     05:43:41.5 +15:01:58  8.2  0.10 147
05VZ122        05:44:05.9 +15:00:17 16.4       146
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 05VZ122, (2017/10/21 21:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  8.15 143
Bellatrix      05:25:07.8 +06:20:58  1.6  9.71 150
131 Tau        05:47:13.1 +14:29:18  5.7  1.12 146
PPM 121301     05:42:40.4 +15:01:32  8.2  0.10 147
05VZ122        05:43:04.8 +14:59:51 16.4       147
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:12:46 UT

Marc W. Buie, Southwest Research Institute

RECON