RECON: TNO occultation with 120061

Event between (120061) 03CO1 and star GA0560:41588601 with event index number of 147924

Geocentric closest approach at 2018/08/12 13:12:17 UTC

J2000 position of star is 19:43:32.7 -33:43:40
Equinox of date position of star is 19:44:44.1 -33:40:58
Stellar brightness G=16.3, use SENSEUP=128
Star is 136 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=21.4

TNO is 17.6 AU from the Sun and 16.7 AU from the Earth.
The TNO is moving 19.3 km/sec on the sky relative to the star, or, 5.7 arcsec/hr.
The 1-sigma error in the time of the event is 679 seconds.
The 1-sigma cross-track error in the shadow position is 3160 km.

The TNO has an absolute magnitude Hv=8.9
Diameter=100.0 km assuming a 5% albedo -- 5.2 sec chord
Diameter=40.8 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 120061, (2018/08/12 13:12UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:40.5 -29:31:24  1.2 41.13 161
38Zet Sgr      19:03:47.7 -29:51:07  2.7  9.50 128
PPM 299365     19:47:12.3 -31:51:44  5.5  1.89 137
PPM 299314     19:44:34.2 -33:36:04  7.6  0.09 135
120061         19:44:44.8 -33:40:57 16.3       136
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 120061, (2018/08/12 13:12UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 41.13 161
38Zet Sgr      19:02:36.7 -29:52:49  2.7  9.50 128
PPM 299365     19:46:01.2 -31:54:31  5.5  1.89 137
PPM 299314     19:43:22.1 -33:38:47  7.6  0.09 135
120061         19:43:32.7 -33:43:40 16.3       135
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:19:27 UT

Marc W. Buie, Southwest Research Institute

RECON