RECON: TNO occultation with 175113

Event between (175113) 04PF115 and star GA0720:33667818 with event index number of 2426262

Geocentric closest approach at 2023/07/08 00:22:20 UTC

J2000 position of star is 23:33:13.6 -17:27:05
Equinox of date position of star is 23:34:26.5 -17:19:21
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 10 degrees from the moon. Moon is 73% illuminated.
Apparent brightness V=20.8

Object is 41.6 AU from the Sun and 41.1 AU from the Earth.
Apparent velocity is 11.3 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 142 seconds.
The 1-sigma cross-track error in the shadow position is 1821 km.

The object has an absolute magnitude Hv=4.5
Diameter=731.2 km assuming a 5% albedo -- 66.1 sec chord
Diameter=298.5 km assuming a 30% albedo -- 27.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 175113, (2023/07/08 00:22UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:56.7 -29:29:49  1.2 14.64  23
104 Aqr        23:42:58.9 -17:41:10  4.7  2.07  11
PPM 241787     23:33:50.0 -17:28:56  8.4  0.22  10
PPM 241807     23:34:28.6 -17:29:54  9.5  0.18  10
175113         23:34:27.1 -17:19:17 16.8        10
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 175113, (2023/07/08 00:22UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 14.64  23
104 Aqr        23:41:45.8 -17:49:00  4.7  2.07  11
PPM 241787     23:32:36.5 -17:36:44  8.4  0.22  10
PPM 241807     23:33:15.2 -17:37:42  9.5  0.18  10
175113         23:33:13.6 -17:27:05 16.8        10
Positions are for J2000

Event circumstances last updated at 2023/05/03 03:52:38 UT

Marc W. Buie, Southwest Research Institute

RECON