RECON: TNO occultation with 471155

Event between (471155) 10GF65 and star GA0520:24483671 with event index number of 2234470

Geocentric closest approach at 2024/05/13 22:05:55 UTC

J2000 position of star is 17:58:01.3 -36:19:05
Equinox of date position of star is 17:59:39.1 -36:19:07
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 143 degrees from the moon. Moon is 35% illuminated.
Apparent brightness V=20.9

Object is 22.3 AU from the Sun and 21.5 AU from the Earth.
Apparent velocity is 16.8 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 744 seconds.
The 1-sigma cross-track error in the shadow position is 1433 km.

The object has an absolute magnitude Hv=7.3
Diameter=229.1 km assuming a 5% albedo -- 12.6 sec chord
Diameter=93.5 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 471155, (2024/05/13 22:06UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.3 -26:29:02  0.9 21.27 124
Kap Sco        17:44:10.5 -39:02:24  2.4  4.10 140
PPM 296992     17:56:47.1 -36:28:41  6.3  0.60 143
PPM 297038     17:58:30.4 -36:39:49  8.5  0.42 143
PPM 297072     18:00:10.4 -36:27:00  9.0  0.17 143
471155         17:59:40.2 -36:19:07 16.2       144
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, (2024/05/13 22:06UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.27 124
Kap Sco        17:42:29.3 -39:01:49  2.4  4.10 140
PPM 296992     17:55:08.1 -36:28:32  6.3  0.60 143
PPM 297038     17:56:51.2 -36:39:44  8.5  0.42 143
PPM 297072     17:58:31.5 -36:26:59  9.0  0.17 143
471155         17:58:01.3 -36:19:05 16.2       143
Positions are for J2000

Event circumstances last updated at 2024/02/12 04:22:11 UT

Marc W. Buie, Southwest Research Institute

RECON