RECON: TNO occultation with 04PY107

Event between 04PY107 and star GA0740:29202928 with event index number of 1078709

Geocentric closest approach at 2022/06/27 07:00:50 UTC

J2000 position of star is 21:44:27.4 -15:04:18
Equinox of date position of star is 21:45:38.6 -14:58:16
Stellar brightness G=13.8, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 113 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=22.8

TNO is 42.4 AU from the Sun and 41.8 AU from the Earth.
The TNO is moving 14.9 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 158 seconds.
The 1-sigma cross-track error in the shadow position is 1959 km.

The TNO has an absolute magnitude Hv=6.4
Diameter=314.8 km assuming a 5% albedo -- 21.1 sec chord
Diameter=128.5 km assuming a 30% albedo -- 8.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 04PY107, (2022/06/27 07:01UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:53.3 -29:30:09  1.2 22.26 102
45 Cap         21:45:14.5 -14:38:43  6.4  0.34 112
PPM 239255     21:44:39.1 -15:02:18  9.4  0.26 113
PPM 239297     21:46:29.9 -14:51:55 10.2  0.22 112
04PY107        21:45:41.0 -14:58:04 13.8       112
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 04PY107, (2022/06/27 07:01UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 22.26 102
45 Cap         21:44:00.9 -14:44:58  6.4  0.34 112
PPM 239255     21:43:25.4 -15:08:32  9.4  0.26 113
PPM 239297     21:45:16.3 -14:58:11 10.2  0.22 112
04PY107        21:44:27.4 -15:04:18 13.8       112
Positions are for J2000

Event circumstances last updated at 2021/10/03 01:40:30 UT

Marc W. Buie, Southwest Research Institute

RECON