RECON: TNO occultation with 471155

Event between (471155) 10GF65 and star GA0520:18265851 with event index number of 2233135

Geocentric closest approach at 2023/05/24 22:36:56 UTC

J2000 position of star is 17:36:26.5 -36:13:15
Equinox of date position of star is 17:38:00.9 -36:14:01
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon. Moon is 26% illuminated.
Apparent brightness V=20.9

Object is 22.5 AU from the Sun and 21.5 AU from the Earth.
Apparent velocity is 20.1 km/sec on the sky relative to the star, or, 4.6 arcsec/hr.
The 1-sigma error in the time of the event is 496 seconds.
The 1-sigma cross-track error in the shadow position is 1551 km.

The object has an absolute magnitude Hv=7.3
Diameter=229.1 km assuming a 5% albedo -- 10.5 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 471155, (2023/05/24 22:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.7 -26:28:55  0.9 17.30 126
34Ups Sco      17:32:21.4 -37:18:44  2.7  1.57 140
PPM 296710     17:44:26.5 -36:57:18  5.4  1.48 142
PPM 296560     17:38:23.1 -36:32:46  8.3  0.32 141
PPM 296549     17:37:44.3 -36:14:07  9.2  0.06 141
471155         17:38:01.3 -36:14:01 16.7       141
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 471155, (2023/05/24 22:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.30 126
34Ups Sco      17:30:45.8 -37:17:46  2.7  1.57 140
PPM 296710     17:42:51.1 -36:56:45  5.4  1.48 142
PPM 296560     17:36:48.1 -36:32:00  8.3  0.32 141
PPM 296549     17:36:09.5 -36:13:20  9.2  0.06 141
471155         17:36:26.5 -36:13:15 16.7       141
Positions are for J2000

Event circumstances last updated at 2023/04/19 02:35:17 UT

Marc W. Buie, Southwest Research Institute

RECON