RECON: TNO occultation with 523690

Event between (523690) 14DN143 and star GA0800:04377387 with event index number of 2743652

Geocentric closest approach at 2029/04/15 13:27:28 UTC

J2000 position of star is 12:23:24.6 -09:24:57
Equinox of date position of star is 12:24:40.0 -09:33:02
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 145 degrees from the moon. Moon is 3% illuminated.
Apparent brightness V=21.9

Object is 46.0 AU from the Sun and 45.1 AU from the Earth.
Apparent velocity is 24.2 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 119 seconds.
The 1-sigma cross-track error in the shadow position is 2094 km.

The object has an absolute magnitude Hv=5.3
Diameter=529.7 km assuming a 5% albedo -- 22.1 sec chord
Diameter=216.2 km assuming a 30% albedo -- 9.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 523690, (2029/04/15 13:29UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:44.4 -11:18:47  1.0 15.30 160
4Gam Crv       12:17:19.1 -17:42:16  2.6  8.33 146
PPM 225575     12:16:41.2 -10:28:54  6.1  2.22 144
PPM 195434     12:24:47.0 -09:56:02  7.8  0.36 145
PPM 195444     12:25:29.4 -09:24:03  9.6  0.23 145
523690         12:24:55.3 -09:34:41 15.2       146
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 523690, (2029/04/15 13:29UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 15.30 160
4Gam Crv       12:15:48.1 -17:32:30  2.6  8.33 146
PPM 225575     12:15:10.6 -10:19:08  6.1  2.22 144
PPM 195434     12:23:16.2 -09:46:18  7.8  0.36 145
PPM 195444     12:23:58.7 -09:14:20  9.6  0.23 145
523690         12:23:24.6 -09:24:57 15.2       145
Positions are for J2000

Event circumstances last updated at 2024/05/05 03:43:37 UT

Marc W. Buie, Southwest Research Institute

RECON