RECON: TNO occultation with 11UJ413

Event between 11UJ413 and star GA0980:01233527 with event index number of 2129064

Geocentric closest approach at 2022/01/09 17:30:15 UTC

J2000 position of star is 06:02:10.4 +08:38:38
Equinox of date position of star is 06:03:22.3 +08:38:32
Stellar brightness G=13.0, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 71 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=22.7

TNO is 38.9 AU from the Sun and 38.0 AU from the Earth.
The TNO is moving 23.4 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 133 seconds.
The 1-sigma cross-track error in the shadow position is 1607 km.

The TNO has an absolute magnitude Hv=6.8
Diameter=261.8 km assuming a 5% albedo -- 11.2 sec chord
Diameter=106.9 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 11UJ413, (2022/01/09 17:30UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:21.9 +07:24:34  0.4  2.13  70
Bellatrix      05:26:18.8 +06:22:04  1.6  9.46  62
PPM 121823     06:04:38.6 +11:40:43  6.0  3.05  71
PPM 149829     06:04:44.4 +08:35:13  8.0  0.34  72
PPM 149778     06:02:28.9 +08:34:32 10.0  0.23  71
PPM 149815     06:03:59.1 +08:38:23 10.6  0.15  71
11UJ413        06:03:22.6 +08:38:32 13.0        72
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 11UJ413, (2022/01/09 17:30UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  2.13  70
Bellatrix      05:25:07.8 +06:20:58  1.6  9.46  62
PPM 121823     06:03:24.8 +11:40:51  6.0  3.05  71
PPM 149829     06:03:32.3 +08:35:21  8.0  0.34  72
PPM 149778     06:01:16.7 +08:34:35 10.0  0.23  71
PPM 149815     06:02:46.9 +08:38:30 10.6  0.15  71
11UJ413        06:02:10.4 +08:38:38 13.0        71
Positions are for J2000

Event circumstances last updated at 2021/12/04 02:02:40 UT

Marc W. Buie, Southwest Research Institute

RECON