RECON: TNO occultation with 523740

Event between (523740) 14TV85 and star GA0740:04820057 with event index number of 2324271

Geocentric closest approach at 2024/04/17 00:53:55 UTC

J2000 position of star is 12:19:53.5 -15:07:04
Equinox of date position of star is 12:21:08.7 -15:15:07
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 61 degrees from the moon. Moon is 62% illuminated.
Apparent brightness V=21.2

Object is 15.0 AU from the Sun and 14.0 AU from the Earth.
Apparent velocity is 20.0 km/sec on the sky relative to the star, or, 7.1 arcsec/hr.
The 1-sigma error in the time of the event is 32 seconds.
The 1-sigma cross-track error in the shadow position is 568 km.

The object has an absolute magnitude Hv=9.4
Diameter=77.3 km assuming a 5% albedo -- 3.9 sec chord
Diameter=31.5 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523740, (2024/04/17 00:54UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:28.6 -11:17:14  1.0 16.38  73
4Gam Crv       12:17:03.6 -17:40:36  2.6  2.61  62
PPM 225705     12:22:11.1 -13:42:01  5.1  1.57  60
PPM 225684     12:21:12.7 -15:11:51  8.1  0.06  61
523740         12:21:09.0 -15:15:09 16.2        62
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 523740, (2024/04/17 00:54UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 16.38  73
4Gam Crv       12:15:48.1 -17:32:30  2.6  2.61  62
PPM 225705     12:20:55.7 -13:33:56  5.1  1.57  60
PPM 225684     12:19:57.3 -15:03:46  8.1  0.06  61
523740         12:19:53.5 -15:07:04 16.2        61
Positions are for J2000

Event circumstances last updated at 2024/03/04 05:25:13 UT

Marc W. Buie, Southwest Research Institute

RECON