RECON: TNO occultation with 13AZ60

Event between 13AZ60 and star UC4-390-057190 with event index number of 58321

Geocentric closest approach at 2017/07/06 10:28:34 UTC

J2000 position of star is 12:30:35.1 -12:08:18
Equinox of date position of star is 12:31:29.2 -12:14:03
Stellar brightness R=15.1, use SENSEUP=128
Star is 64 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=20.6

TNO is 9.7 AU from the Sun and 9.7 AU from the Earth.
The TNO is moving 13.6 km/sec on the sky relative to the star, or, 6.9 arcsec/hr.
The 1-sigma error in the time of the event is 66 seconds.
The 1-sigma cross-track error in the shadow position is 893 km.

The TNO has an absolute magnitude Hv=10.3
Diameter=53.5 km assuming a 5% albedo -- 3.9 sec chord
Diameter=21.8 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 13AZ60, (2017/07/06 10:29UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:07.1 -11:15:08  1.0 13.40  51
4Gam Crv       12:16:42.5 -17:38:21  2.6  6.48  66
PPM 225805     12:26:06.1 -11:42:27  6.3  1.42  65
PPM 225950     12:32:18.5 -12:34:41  8.5  0.40  64
PPM 225923     12:30:52.8 -12:09:44  9.1  0.17  64
13AZ60         12:31:29.6 -12:14:06 15.1        64
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, (2017/07/06 10:29UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 13.40  51
4Gam Crv       12:15:48.2 -17:32:31  2.6  6.48  66
PPM 225805     12:25:11.7 -11:36:39  6.3  1.42  65
PPM 225950     12:31:24.0 -12:28:54  8.5  0.40  64
PPM 225923     12:29:58.3 -12:03:56  9.1  0.17  64
13AZ60         12:30:35.1 -12:08:18 15.1        64
Positions are for J2000

Event circumstances last updated at 2017/05/15 18:00:52 UT

Marc W. Buie, Southwest Research Institute

RECON