RECON: TNO occultation with 11UQ62

Event between 11UQ62 and star GA1080:01477704 with event index number of 2134781

Geocentric closest approach at 2021/11/29 18:52:53 UTC

J2000 position of star is 05:54:38.7 +18:56:54
Equinox of date position of star is 05:55:56.1 +18:57:03
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 97 degrees from the moon. Moon is 27% illuminated.
TNO apparent brightness V=21.9

TNO is 17.0 AU from the Sun and 16.0 AU from the Earth.
The TNO is moving 20.1 km/sec on the sky relative to the star, or, 6.2 arcsec/hr.
The 1-sigma error in the time of the event is 41 seconds.
The 1-sigma cross-track error in the shadow position is 604 km.

The TNO has an absolute magnitude Hv=9.6
Diameter=72.4 km assuming a 5% albedo -- 3.6 sec chord
Diameter=29.6 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 11UQ62, (2021/11/29 18:53UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:21.5 +07:24:34  0.4 11.54  98
Alhena         06:38:58.7 +16:22:43  1.9 10.57  87
57 Ori         05:56:14.5 +19:45:07  5.6  0.80  97
PPM 121570     05:55:39.9 +18:54:09  8.0  0.08  97
11UQ62         05:55:56.2 +18:57:03 15.9        97
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 11UQ62, (2021/11/29 18:53UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 11.54  98
Alhena         06:37:42.8 +16:23:57  1.9 10.57  87
57 Ori         05:54:56.6 +19:44:58  5.6  0.80  97
PPM 121570     05:54:22.5 +18:53:59  8.0  0.08  97
11UQ62         05:54:38.7 +18:56:54 15.9        97
Positions are for J2000

Event circumstances last updated at 2021/11/26 00:01:58 UT

Marc W. Buie, Southwest Research Institute

RECON