RECON: TNO occultation with 523784

Event between (523784) 15BJ518 and star GA0680:06036568 with event index number of 2748698

Geocentric closest approach at 2029/04/16 20:06:25 UTC

J2000 position of star is 14:14:43.3 -20:15:03
Equinox of date position of star is 14:16:05.3 -20:21:51
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 159 degrees from the moon. Moon is 8% illuminated.
Apparent brightness V=20.7

Object is 18.0 AU from the Sun and 17.1 AU from the Earth.
Apparent velocity is 21.7 km/sec on the sky relative to the star, or, 6.3 arcsec/hr.
The 1-sigma error in the time of the event is 92 seconds.
The 1-sigma cross-track error in the shadow position is 1093 km.

The object has an absolute magnitude Hv=8.2
Diameter=133.0 km assuming a 5% albedo -- 6.3 sec chord
Diameter=54.3 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523784, (2029/04/16 20:03UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:44.4 -11:18:48  1.0 14.98 145
PPM 228564     14:18:41.3 -18:43:13  6.1  1.75 159
PPM 262655     14:15:37.4 -20:20:38  8.3  0.18 159
523784         14:16:21.5 -20:23:10 16.0       159
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 523784, (2029/04/16 20:03UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 14.98 145
PPM 228564     14:17:03.8 -18:35:09  6.1  1.75 159
PPM 262655     14:13:59.3 -20:12:29  8.3  0.18 159
523784         14:14:43.3 -20:15:03 16.0       159
Positions are for J2000

Event circumstances last updated at 2024/06/26 21:34:37 UT

Marc W. Buie, Southwest Research Institute

RECON