RECON: TNO occultation with 143707

Event between (143707) 03UY117 and star GA1120:00490265 with event index number of 2468480

Geocentric closest approach at 2023/07/26 06:31:46 UTC

J2000 position of star is 03:51:06.5 +23:29:32
Equinox of date position of star is 03:52:28.3 +23:33:36
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 156 degrees from the moon. Moon is 54% illuminated.
TNO apparent brightness V=21.6

TNO is 35.0 AU from the Sun and 35.5 AU from the Earth.
The TNO is moving 19.3 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 82 seconds.
The 1-sigma cross-track error in the shadow position is 1304 km.

The TNO has an absolute magnitude Hv=6.0
Diameter=378.5 km assuming a 5% albedo -- 20.1 sec chord
Diameter=154.5 km assuming a 30% albedo -- 8.2 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 143707, (2023/07/26 06:31UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:16.5 +16:33:17  0.8 12.62 147
44Zet Per      03:55:37.2 +31:57:06  2.8  8.42 152
PPM 092951     03:51:07.7 +23:46:55  6.1  0.39 157
PPM 092979     03:52:26.8 +23:29:52  9.9  0.07 156
143707         03:52:30.6 +23:33:43 16.4       156
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 143707, (2023/07/26 06:31UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 12.62 147
44Zet Per      03:54:07.9 +31:53:01  2.8  8.42 152
PPM 092951     03:49:43.5 +23:42:42  6.1  0.39 157
PPM 092979     03:51:02.7 +23:25:42  9.9  0.07 156
143707         03:51:06.5 +23:29:32 16.4       156
Positions are for J2000

Event circumstances last updated at 2022/12/02 03:10:18 UT

Marc W. Buie, Southwest Research Institute

RECON