RECON: TNO occultation with 13TN187

Event between 13TN187 and star GA0980:00280170 with event index number of 2703669

Geocentric closest approach at 2022/10/02 00:17:56 UTC

J2000 position of star is 03:16:06.8 +08:45:06
Equinox of date position of star is 03:17:17.3 +08:49:52
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon. Moon is 39% illuminated.
TNO apparent brightness V=23.0

TNO is 33.8 AU from the Sun and 33.1 AU from the Earth.
The TNO is moving 17.2 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 157 seconds.
The 1-sigma cross-track error in the shadow position is 1629 km.

The TNO has an absolute magnitude Hv=7.6
Diameter=182.0 km assuming a 5% albedo -- 10.6 sec chord
Diameter=74.3 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is 7:3EEEE
 
 
 
 
 
 
 
 

Star training set for 13TN187, (2022/10/02 00:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:13.7 +16:33:12  0.8 20.94 162
Menkar         03:03:28.3 +04:10:40  2.5  5.79 136
1Omi Tau       03:26:02.5 +09:06:27  3.6  2.17 143
PPM 146370     03:16:01.4 +09:03:42  8.5  0.40 141
13TN187        03:17:20.3 +08:50:04 16.0       142
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 13TN187, (2022/10/02 00:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 20.94 162
Menkar         03:02:16.8 +04:05:21  2.5  5.79 136
1Omi Tau       03:24:48.7 +09:01:42  3.6  2.17 143
PPM 146370     03:14:47.8 +08:58:42  8.5  0.40 141
13TN187        03:16:06.8 +08:45:06 16.0       141
Positions are for J2000

Event circumstances last updated at 2021/11/02 00:55:10 UT

Marc W. Buie, Southwest Research Institute

RECON