RECON: TNO occultation with 13AZ60

Event between 13AZ60 and star UC4-316-073680 with event index number of 197026

Geocentric closest approach at 2019/06/22 11:19:53 UTC

J2000 position of star is 13:59:13.4 -26:55:11
Equinox of date position of star is 14:00:14.6 -27:00:22
Stellar brightness R=15.1, use SENSEUP=128
Star is 110 degrees from the moon. Moon is 77% illuminated.
TNO apparent brightness V=21.5

TNO is 12.5 AU from the Sun and 11.8 AU from the Earth.
The TNO is moving 8.7 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 153 seconds.
The 1-sigma cross-track error in the shadow position is 1242 km.

The TNO has an absolute magnitude Hv=10.3
Diameter=53.5 km assuming a 5% albedo -- 6.1 sec chord
Diameter=21.8 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 13AZ60, (2019/06/22 11:20UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:13.3 -11:15:45  1.0 17.68 125
5The Cen       14:07:50.2 -36:27:53  2.1  9.58 104
PPM 262401     14:03:29.6 -27:31:23  5.1  0.87 109
PPM 262369     14:01:42.4 -26:21:39  7.1  0.72 110
PPM 262331     13:59:51.7 -26:45:54  9.1  0.27 110
13AZ60         14:00:19.9 -27:00:49 15.1       110
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 13AZ60, (2019/06/22 11:20UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 17.68 125
5The Cen       14:06:40.2 -36:22:21  2.1  9.58 104
PPM 262401     14:02:22.8 -27:25:48  5.1  0.87 109
PPM 262369     14:00:36.1 -26:16:02  7.1  0.72 110
PPM 262331     13:58:45.3 -26:40:16  9.1  0.27 110
13AZ60         13:59:13.4 -26:55:11 15.1       110
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:03:45 UT

Marc W. Buie, Southwest Research Institute

RECON