RECON: TNO occultation with 14WD556

Event between 14WD556 and star GA0680:00134310 with event index number of 1969082

Geocentric closest approach at 2022/01/09 17:24:46 UTC

J2000 position of star is 01:47:24.9 -21:07:40
Equinox of date position of star is 01:48:26.7 -21:01:11
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 27 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=23.4

TNO is 31.7 AU from the Sun and 31.7 AU from the Earth.
The TNO is moving 17.8 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 109 seconds.
The 1-sigma cross-track error in the shadow position is 2983 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=112.2 km assuming a 5% albedo -- 7.8 sec chord
Diameter=45.8 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 14WD556, (2022/01/09 17:23UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:51.8 -29:30:18  1.2 39.05  47
Diphda         00:44:41.6 -17:51:58  2.0 15.35  24
PPM 244176     01:39:54.9 -21:09:50  5.4  2.00  26
PPM 244310     01:48:41.5 -20:44:10  6.6  0.29  26
PPM 244302     01:48:23.3 -20:54:27  9.4  0.11  26
14WD556        01:48:27.4 -21:01:06 14.9        27
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 14WD556, (2022/01/09 17:23UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 39.05  47
Diphda         00:43:35.7 -17:59:11  2.0 15.35  24
PPM 244176     01:38:52.0 -21:16:31  5.4  2.00  26
PPM 244310     01:47:38.9 -20:50:44  6.6  0.29  26
PPM 244302     01:47:20.6 -21:01:00  9.4  0.11  26
14WD556        01:47:24.9 -21:07:40 14.9        27
Positions are for J2000

Event circumstances last updated at 2021/10/07 00:34:05 UT

Marc W. Buie, Southwest Research Institute

RECON