RECON: TNO occultation with 04DN64

Event between 04DN64 and star UC4-416-057366 with event index number of 132877

Geocentric closest approach at 2018/08/08 22:49:57 UTC

J2000 position of star is 13:19:45.9 -06:51:23
Equinox of date position of star is 13:20:40.3 -06:56:50
Stellar brightness R=13.2, use SENSEUP=32
Star is 100 degrees from the moon. Moon is 9% illuminated.
TNO apparent brightness V=24.0

TNO is 42.2 AU from the Sun and 42.7 AU from the Earth.
The TNO is moving 17.4 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 89 seconds.
The 1-sigma cross-track error in the shadow position is 1547 km.

The TNO has an absolute magnitude Hv=7.6
Diameter=183.7 km assuming a 5% albedo -- 10.5 sec chord
Diameter=75.0 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 04DN64, (2018/08/08 22:50UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:10.5 -11:15:28  1.0  4.51 102
66 Vir         13:25:31.4 -05:15:39  6.1  2.07 100
PPM 196397     13:20:43.1 -06:38:20  8.4  0.31  99
PPM 196403     13:21:07.0 -07:06:33  9.6  0.18 100
04DN64         13:20:44.2 -06:57:13 13.2       100
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 04DN64, (2018/08/08 22:50UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  4.51 102
66 Vir         13:24:33.4 -05:09:51  6.1  2.07 100
PPM 196397     13:19:44.9 -06:32:30  8.4  0.31  99
PPM 196403     13:20:08.7 -07:00:43  9.6  0.18 100
04DN64         13:19:45.9 -06:51:23 13.2        99
Positions are for J2000

Event circumstances last updated at 2017/05/14 18:42:29 UT

Marc W. Buie, Southwest Research Institute

RECON