RECON: TNO occultation with 13RQ156

Event between 13RQ156 and star GA0920:00037197 with event index number of 2713238

Geocentric closest approach at 2023/01/21 18:42:37 UTC

J2000 position of star is 00:24:13.2 +02:57:36
Equinox of date position of star is 00:25:20.5 +03:04:51
Stellar brightness G=11.0, use SENSEUP=4 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 67 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=23.5

TNO is 44.4 AU from the Sun and 44.8 AU from the Earth.
The TNO is moving 16.5 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 454 seconds.
The 1-sigma cross-track error in the shadow position is 5330 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=252.4 km assuming a 5% albedo -- 15.3 sec chord
Diameter=103.0 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 13RQ156, (2023/01/21 18:43UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:55.2 -29:29:58  1.2 38.61  36
Algenib        00:14:25.6 +15:18:42  2.8 12.52  71
44 Psc         00:26:35.2 +02:04:02  5.8  1.06  66
PPM 143441     00:24:49.6 +02:52:14  7.9  0.26  66
PPM 143452     00:25:11.8 +03:07:27 10.6  0.06  67
13RQ156        00:25:24.3 +03:05:15 11.0        67
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 13RQ156, (2023/01/21 18:43UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 38.61  36
Algenib        00:13:14.2 +15:11:01  2.8 12.52  71
44 Psc         00:25:24.2 +01:56:22  5.8  1.06  66
PPM 143441     00:23:38.5 +02:44:35  7.9  0.26  66
PPM 143452     00:24:00.7 +02:59:47 10.6  0.06  67
13RQ156        00:24:13.2 +02:57:36 11.0        67
Positions are for J2000

Event circumstances last updated at 2021/11/02 01:05:50 UT

Marc W. Buie, Southwest Research Institute

RECON