RECON: TNO occultation with 511553

Event between (511553) 14UK225 and star GA1060:00244666 with event index number of 282378

Geocentric closest approach at 2020/07/10 15:33:48 UTC

J2000 position of star is 02:28:53.5 +17:30:35
Equinox of date position of star is 02:30:01.7 +17:36:01
Stellar brightness G=12.3, use SENSEUP=16
Star is 48 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=26.0

TNO is 38.0 AU from the Sun and 38.4 AU from the Earth.
The TNO is moving 16.0 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 315 seconds.
The 1-sigma cross-track error in the shadow position is 2066 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=190.6 km assuming a 5% albedo -- 3.8 sec chord
Diameter=77.8 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 511553, (2020/07/10 15:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:06.1 +16:32:56  0.8 30.35  76
Hamal          02:08:20.1 +23:33:31  2.0  7.83  47
27 Ari         02:32:02.9 +17:47:37  6.2  0.52  48
PPM 118253     02:29:31.3 +17:27:26  8.6  0.19  48
511553         02:30:01.9 +17:36:02 12.3        48
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 511553, (2020/07/10 15:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 30.35  76
Hamal          02:07:10.7 +23:27:42  2.0  7.83  47
27 Ari         02:30:54.4 +17:42:12  6.2  0.52  48
PPM 118253     02:28:23.0 +17:21:58  8.6  0.19  48
511553         02:28:53.5 +17:30:35 12.3        48
Positions are for J2000

Event circumstances last updated at 2020/06/21 04:46:13 UT

Marc W. Buie, Southwest Research Institute

RECON