RECON: TNO occultation with 469704

Event between (469704) 05EZ296 and star UC4-395-056356 with event index number of 180723

Geocentric closest approach at 2019/02/26 01:35:40 UTC

J2000 position of star is 13:47:23.0 -11:11:07
Equinox of date position of star is 13:48:18.6 -11:16:17
Stellar brightness R=16.3, use SENSEUP=128
Star is 34 degrees from the moon. Moon is 54% illuminated.
TNO apparent brightness V=22.1

TNO is 34.1 AU from the Sun and 33.5 AU from the Earth.
The TNO is moving 12.7 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 252 seconds.
The 1-sigma cross-track error in the shadow position is 1778 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 21.6 sec chord
Diameter=112.4 km assuming a 30% albedo -- 8.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 469704, (2019/02/26 01:36UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:12.3 -11:15:39  1.0  5.44  39
86 Vir         13:46:57.7 -12:31:18  5.1  1.29  34
PPM 227806     13:46:53.4 -11:18:58  8.1  0.37  34
PPM 227840     13:48:05.0 -11:13:55  9.7  0.09  34
469704         13:48:24.2 -11:16:49 16.3        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 469704, (2019/02/26 01:36UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  5.44  39
86 Vir         13:45:56.3 -12:25:35  5.1  1.29  34
PPM 227806     13:45:52.3 -11:13:15  8.1  0.37  34
PPM 227840     13:47:03.8 -11:08:13  9.7  0.09  34
469704         13:47:23.0 -11:11:07 16.3        34
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:11:01 UT

Marc W. Buie, Southwest Research Institute

RECON