RECON: TNO occultation with 523790

Event between (523790) 15HP9 and star GA0680:40668363 with event index number of 2784823

Geocentric closest approach at 2029/06/15 02:08:38 UTC

J2000 position of star is 19:23:50.5 -20:17:08
Equinox of date position of star is 19:25:17.1 -20:14:11
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 170 degrees from the moon. Moon is 9% illuminated.
Apparent brightness V=23.3

Object is 18.7 AU from the Sun and 17.8 AU from the Earth.
Apparent velocity is 19.9 km/sec on the sky relative to the star, or, 5.5 arcsec/hr.
The 1-sigma error in the time of the event is 489 seconds.
The 1-sigma cross-track error in the shadow position is 2447 km.

The object has an absolute magnitude Hv=10.5
Diameter=50.1 km assuming a 5% albedo -- 2.4 sec chord
Diameter=20.5 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523790, (2029/06/15 02:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:13.1 -26:29:41  0.9 40.32 130
Nunki          18:57:05.4 -26:15:26  2.0  8.90 162
50 Sgr         19:28:04.4 -21:42:57  5.6  1.60 171
PPM 269702     19:24:24.7 -20:35:07  7.0  0.45 170
PPM 269725     19:25:38.0 -20:08:34  9.0  0.08 170
523790         19:25:34.7 -20:13:35 16.4       171
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 523790, (2029/06/15 02:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 40.32 130
Nunki          18:55:15.9 -26:17:49  2.0  8.90 162
50 Sgr         19:26:19.2 -21:46:36  5.6  1.60 171
PPM 269702     19:22:40.3 -20:38:37  7.0  0.45 170
PPM 269725     19:23:54.0 -20:12:07  9.0  0.08 170
523790         19:23:50.5 -20:17:08 16.4       170
Positions are for J2000

Event circumstances last updated at 2024/06/27 21:02:20 UT

Marc W. Buie, Southwest Research Institute

RECON