RECON: TNO occultation with 13AZ60

Event between 13AZ60 and star GA0680:05659739 with event index number of 148354

Geocentric closest approach at 2018/08/19 15:22:57 UTC

J2000 position of star is 13:26:17.2 -20:57:36
Equinox of date position of star is 13:27:17.3 -21:03:19
Stellar brightness G=15.0, use SENSEUP=128
Star is 46 degrees from the moon. Moon is 63% illuminated.
TNO apparent brightness V=21.3

TNO is 11.2 AU from the Sun and 11.7 AU from the Earth.
The TNO is moving 25.3 km/sec on the sky relative to the star, or, 10.8 arcsec/hr.
The 1-sigma error in the time of the event is 44 seconds.
The 1-sigma cross-track error in the shadow position is 2258 km.

The TNO has an absolute magnitude Hv=10.3
Diameter=53.5 km assuming a 5% albedo -- 2.1 sec chord
Diameter=21.8 km assuming a 30% albedo -- 0.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 13AZ60, (2018/08/19 15:23UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:10.6 -11:15:29  1.0  9.80  48
PPM 261604     13:24:57.8 -21:01:17  6.4  0.55  47
PPM 261643     13:26:57.3 -21:10:40  9.5  0.15  46
13AZ60         13:27:18.0 -21:03:23 15.0        46
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, (2018/08/19 15:23UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  9.80  48
PPM 261604     13:23:57.0 -20:55:29  6.4  0.55  47
PPM 261643     13:25:56.4 -21:04:53  9.5  0.15  46
13AZ60         13:26:17.2 -20:57:36 15.0        46
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:20:30 UT

Marc W. Buie, Southwest Research Institute

RECON