RECON: TNO occultation with 471155

Event between (471155) 10GF65 and star GA0520:20531847 with event index number of 2234964

Geocentric closest approach at 2024/07/29 21:31:01 UTC

J2000 position of star is 17:46:15.1 -36:16:22
Equinox of date position of star is 17:47:54.2 -36:16:50
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 152 degrees from the moon. Moon is 31% illuminated.
Apparent brightness V=20.9

Object is 22.3 AU from the Sun and 21.5 AU from the Earth.
Apparent velocity is 15.8 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 679 seconds.
The 1-sigma cross-track error in the shadow position is 4823 km.

The object has an absolute magnitude Hv=7.3
Diameter=229.1 km assuming a 5% albedo -- 13.4 sec chord
Diameter=93.5 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 471155, (2024/07/29 21:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:55.1 -26:29:04  0.9 19.08 170
Kap Sco        17:44:11.4 -39:02:24  2.4  2.86 151
PPM 296710     17:44:31.3 -36:57:20  5.4  0.96 152
PPM 296783     17:48:31.9 -36:33:19  8.5  0.30 152
471155         17:47:54.7 -36:16:50 16.9       151
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, (2024/07/29 21:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.08 170
Kap Sco        17:42:29.3 -39:01:49  2.4  2.86 151
PPM 296710     17:42:51.1 -36:56:45  5.4  0.96 152
PPM 296783     17:46:52.0 -36:32:52  8.5  0.30 152
471155         17:46:15.1 -36:16:22 16.9       152
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:49:20 UT

Marc W. Buie, Southwest Research Institute

RECON