RECON: TNO occultation with 556004

Event between (556004) 14HA200 and star GA0800:04756417 with event index number of 2485301

Geocentric closest approach at 2022/09/08 18:10:57 UTC

J2000 position of star is 15:23:51.9 -09:16:56
Equinox of date position of star is 15:25:04.5 -09:21:38
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 93 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=21.6

TNO is 45.8 AU from the Sun and 46.2 AU from the Earth.
The TNO is moving 17.7 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 103 seconds.
The 1-sigma cross-track error in the shadow position is 1703 km.

The TNO has an absolute magnitude Hv=4.8
Diameter=673.0 km assuming a 5% albedo -- 38.0 sec chord
Diameter=274.8 km assuming a 30% albedo -- 15.5 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 556004, (2022/09/08 18:11UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:48.1 -26:28:49  0.9 23.13  74
27Bet Lib      15:18:13.9 -09:27:55  2.6  1.70  95
31Eps Lib      15:25:25.9 -10:24:08  4.8  1.04  93
PPM 198490     15:22:29.2 -08:53:21  7.8  0.80  94
PPM 198556     15:25:32.8 -09:18:48  9.5  0.12  93
556004         15:25:05.5 -09:21:42 16.1        93
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 556004, (2022/09/08 18:11UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.13  74
27Bet Lib      15:17:00.3 -09:22:59  2.6  1.70  95
31Eps Lib      15:24:11.8 -10:19:23  4.8  1.04  93
PPM 198490     15:21:15.8 -08:48:31  7.8  0.80  94
PPM 198556     15:24:19.2 -09:14:03  9.5  0.12  93
556004         15:23:51.9 -09:16:56 16.1        93
Positions are for J2000

Event circumstances last updated at 2022/05/14 23:45:57 UT

Marc W. Buie, Southwest Research Institute

RECON