RECON: TNO occultation with 03HM57

Event between 03HM57 and star GA0540:35144689 with event index number of 2001924

Geocentric closest approach at 2022/08/16 02:54:18 UTC

J2000 position of star is 18:30:48.2 -34:34:34
Equinox of date position of star is 18:32:16.7 -34:33:33
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 100 degrees from the moon. Moon is 80% illuminated.
TNO apparent brightness V=20.1

TNO is 14.2 AU from the Sun and 13.5 AU from the Earth.
The TNO is moving 10.9 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 287 seconds.
The 1-sigma cross-track error in the shadow position is 739 km.

The TNO has an absolute magnitude Hv=8.4
Diameter=128.8 km assuming a 5% albedo -- 11.8 sec chord
Diameter=52.6 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 03HM57, (2022/08/16 02:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.9 -26:28:49  0.9 27.27 127
38Zet Sgr      19:04:02.9 -29:50:45  2.7  8.20  93
PPM 297700     18:27:24.4 -33:55:52  6.3  1.19 101
PPM 297833     18:32:53.6 -34:43:58  8.4  0.21 100
PPM 297815     18:32:14.9 -34:37:37  9.7  0.07 100
03HM57         18:32:18.4 -34:33:32 16.1       100
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 03HM57, (2022/08/16 02:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 27.27 127
38Zet Sgr      19:02:36.7 -29:52:49  2.7  8.20  93
PPM 297700     18:25:54.6 -33:56:44  6.3  1.19 101
PPM 297833     18:31:23.3 -34:45:01  8.4  0.21 100
PPM 297815     18:30:44.6 -34:38:39  9.7  0.07 100
03HM57         18:30:48.2 -34:34:34 16.1       100
Positions are for J2000

Event circumstances last updated at 2022/03/13 02:15:55 UT

Marc W. Buie, Southwest Research Institute

RECON