RECON: TNO occultation with 13MB12

Event between 13MB12 and star GA0860:00050256 with event index number of 2364108

Geocentric closest approach at 2023/08/06 05:29:28 UTC

J2000 position of star is 00:35:38.3 -03:09:01
Equinox of date position of star is 00:36:45.2 -03:01:49
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 10 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=23.6

TNO is 20.8 AU from the Sun and 20.2 AU from the Earth.
The TNO is moving 12.0 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 211 seconds.
The 1-sigma cross-track error in the shadow position is 2122 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=54.0 km assuming a 5% albedo -- 4.5 sec chord
Diameter=22.0 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 13MB12, (2023/08/06 05:29UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:56.9 -29:29:48  1.2 35.21  45
Diphda         00:44:46.3 -17:51:27  2.0 14.96  23
13 Cet         00:36:27.8 -03:27:48  5.0  0.45  11
PPM 182442     00:38:09.1 -03:16:16  8.0  0.41  10
PPM 182406     00:36:04.7 -03:13:42 10.0  0.28  10
13MB12         00:36:50.6 -03:01:14 14.2        10
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 13MB12, (2023/08/06 05:29UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 35.21  45
Diphda         00:43:35.7 -17:59:11  2.0 14.96  23
13 Cet         00:35:15.5 -03:35:35  5.0  0.45  11
PPM 182442     00:36:56.8 -03:24:03  8.0  0.41  10
PPM 182406     00:34:52.4 -03:21:29 10.0  0.28  10
13MB12         00:35:38.3 -03:09:01 14.2        10
Positions are for J2000

Event circumstances last updated at 2021/11/02 01:08:22 UT

Marc W. Buie, Southwest Research Institute

RECON