RECON: TNO occultation with 533507

Event between (533507) 14HV199 and star GA0760:05703307 with event index number of 2163312

Geocentric closest approach at 2027/07/28 20:51:23 UTC

J2000 position of star is 16:22:31.9 -12:09:52
Equinox of date position of star is 16:23:48.3 -12:13:00
Stellar brightness G=13.3, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 166 degrees from the moon. Moon is 27% illuminated.
TNO apparent brightness V=22.4

TNO is 38.5 AU from the Sun and 37.9 AU from the Earth.
The TNO is moving 12.0 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 293 seconds.
The 1-sigma cross-track error in the shadow position is 2690 km.

The TNO has an absolute magnitude Hv=6.4
Diameter=307.6 km assuming a 5% albedo -- 26.0 sec chord
Diameter=125.6 km assuming a 30% albedo -- 10.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 533507, (2027/07/28 20:56UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.2 -26:29:26  0.9 14.36 173
13Zet Oph      16:38:40.8 -10:37:15  2.6  3.92 162
PPM 231511     16:20:34.0 -14:56:16  5.8  2.84 168
PPM 231649     16:25:43.9 -11:57:35  8.0  0.49 165
PPM 231618     16:24:20.9 -12:18:47  9.7  0.11 166
533507         16:24:04.0 -12:13:39 13.3       165
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 533507, (2027/07/28 20:56UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.36 173
13Zet Oph      16:37:09.6 -10:34:01  2.6  3.92 162
PPM 231511     16:19:00.4 -14:52:22  5.8  2.84 168
PPM 231649     16:24:12.0 -11:53:53  8.0  0.49 165
PPM 231618     16:22:48.8 -12:15:02  9.7  0.11 166
533507         16:22:31.9 -12:09:52 13.3       165
Positions are for J2000

Event circumstances last updated at 2022/11/22 03:10:32 UT

Marc W. Buie, Southwest Research Institute

RECON