RECON: TNO occultation with 02CW224

Event between 02CW224 and star GA1180:01789511 with event index number of 362828

Geocentric closest approach at 2020/10/24 02:37:35 UTC

J2000 position of star is 05:47:51.7 +29:08:37
Equinox of date position of star is 05:49:08.7 +29:08:58
Stellar brightness G=15.1, use SENSEUP=128
Star is 140 degrees from the moon. Moon is 56% illuminated.
TNO apparent brightness V=25.5

TNO is 34.3 AU from the Sun and 33.7 AU from the Earth.
The TNO is moving 11.9 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 675 seconds.
The 1-sigma cross-track error in the shadow position is 2140 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=227.0 km assuming a 5% albedo -- 5.1 sec chord
Diameter=92.7 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 02CW224, (2020/10/24 02:38UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.0 +16:32:58  0.8 20.79 121
Alnath         05:27:36.6 +28:37:23  1.6  4.75 135
PPM 094619     05:40:37.8 +29:13:31  5.9  1.87 138
PPM 094916     05:50:13.1 +29:08:30  8.3  0.23 140
02CW224        05:49:11.2 +29:08:58 15.1       140
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 02CW224, (2020/10/24 02:38UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 20.79 121
Alnath         05:26:17.5 +28:36:23  1.6  4.75 135
PPM 094619     05:39:18.3 +29:12:54  5.9  1.87 138
PPM 094916     05:48:53.6 +29:08:11  8.3  0.23 140
02CW224        05:47:51.7 +29:08:37 15.1       140
Positions are for J2000

Event circumstances last updated at 2020/03/06 22:14:46 UT

Marc W. Buie, Southwest Research Institute

RECON