RECON: TNO occultation with 182222

Event between (182222) 00YU1 and star GA1080:00856472 with event index number of 165563

Geocentric closest approach at 2018/11/09 18:02:53 UTC

J2000 position of star is 05:10:30.4 +18:10:25
Equinox of date position of star is 05:11:35.0 +18:11:43
Stellar brightness G=15.5, use SENSEUP=128
Star is 174 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=23.2

TNO is 42.8 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 21.5 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 733 seconds.
The 1-sigma cross-track error in the shadow position is 5878 km.

The TNO has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 12.3 sec chord
Diameter=107.4 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 182222, (2018/11/09 18:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.3 +16:32:45  0.8  8.42 177
Alnath         05:27:29.1 +28:37:18  1.6 11.04 166
104 Tau        05:08:34.0 +18:40:08  5.6  0.86 175
PPM 120670     05:11:45.6 +17:27:44  7.7  0.73 174
PPM 120656     05:10:41.4 +17:55:51  9.4  0.34 174
182222         05:11:36.5 +18:11:45 15.5       174
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 182222, (2018/11/09 18:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  8.42 177
Alnath         05:26:17.5 +28:36:23  1.6 11.04 166
104 Tau        05:07:27.7 +18:38:43  5.6  0.86 175
PPM 120670     05:10:39.9 +17:26:24  7.7  0.73 174
PPM 120656     05:09:35.4 +17:54:29  9.4  0.34 174
182222         05:10:30.4 +18:10:25 15.5       174
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:33:21 UT

Marc W. Buie, Southwest Research Institute

RECON