RECON: TNO occultation with 119951

Event between (119951) 02KX14 and star GA0660:22399814 with event index number of 2114411

Geocentric closest approach at 2025/04/29 06:29:50 UTC

J2000 position of star is 17:59:26.1 -23:34:00
Equinox of date position of star is 18:00:54.4 -23:34:00
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon. Moon is 3% illuminated.
Apparent brightness V=20.7

Object is 38.8 AU from the Sun and 38.1 AU from the Earth.
Apparent velocity is 13.5 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 232 seconds.
The 1-sigma cross-track error in the shadow position is 1426 km.

The object has an absolute magnitude Hv=4.7
Diameter=691.9 km assuming a 5% albedo -- 51.0 sec chord
Diameter=282.4 km assuming a 30% albedo -- 20.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 119951, (2025/04/29 06:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:57.9 -26:29:09  0.9 20.57 170
Nunki          18:56:50.0 -26:15:46  2.0 12.94 138
4 Sgr          18:01:20.4 -23:48:58  4.8  0.26 150
PPM 267552     17:58:40.4 -23:56:26  6.5  0.65 150
PPM 267654     18:01:57.5 -23:30:06  9.4  0.23 150
119951         18:00:58.7 -23:34:00 16.1       149
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 119951, (2025/04/29 06:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.57 170
Nunki          18:55:15.9 -26:17:49  2.0 12.94 138
4 Sgr          17:59:47.6 -23:48:59  4.8  0.26 150
PPM 267552     17:57:07.5 -23:56:22  6.5  0.65 150
PPM 267654     18:00:24.9 -23:30:08  9.4  0.23 150
119951         17:59:26.1 -23:34:00 16.1       150
Positions are for J2000

Event circumstances last updated at 2024/02/22 04:20:20 UT

Marc W. Buie, Southwest Research Institute

RECON