RECON: TNO occultation with 03TH58

Event between 03TH58 and star GA0980:02032373 with event index number of 2003384

Geocentric closest approach at 2021/12/08 00:37:00 UTC

J2000 position of star is 06:36:02.6 +09:12:06
Equinox of date position of star is 06:37:14.4 +09:10:56
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 146 degrees from the moon. Moon is 19% illuminated.
TNO apparent brightness V=22.9

TNO is 36.6 AU from the Sun and 35.7 AU from the Earth.
The TNO is moving 23.8 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 144 seconds.
The 1-sigma cross-track error in the shadow position is 2349 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=194.1 km assuming a 5% albedo -- 9.2 sec chord
Diameter=79.2 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 03TH58, (2021/12/08 00:37UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:21.6 +07:24:34  0.4 10.27 136
Alhena         06:38:58.7 +16:22:43  1.9  7.21 149
14 Mon         06:35:57.6 +07:33:13  6.5  1.66 145
PPM 150882     06:38:35.7 +09:20:25  8.1  0.37 146
PPM 150841     06:37:20.7 +08:51:27 10.9  0.33 146
03TH58         06:37:14.8 +09:10:56 14.0       146
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 03TH58, (2021/12/08 00:37UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.27 136
Alhena         06:37:42.8 +16:23:57  1.9  7.21 149
14 Mon         06:34:46.3 +07:34:21  6.5  1.66 145
PPM 150882     06:37:23.5 +09:21:37  8.1  0.37 146
PPM 150841     06:36:08.7 +08:52:37 10.9  0.33 146
03TH58         06:36:02.6 +09:12:06 14.0       146
Positions are for J2000

Event circumstances last updated at 2021/10/26 23:50:09 UT

Marc W. Buie, Southwest Research Institute

RECON