RECON: TNO occultation with 307251

Event between (307251) 02KW14 and star GA0600:31642939 with event index number of 2802060

Geocentric closest approach at 2029/07/08 21:49:48 UTC

J2000 position of star is 17:53:20.9 -28:19:13
Equinox of date position of star is 17:54:53.8 -28:19:26
Stellar brightness G=0.0, use SENSEUP=2 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 165 degrees from the moon. Moon is 8% illuminated.
Apparent brightness V=22.0

Object is 44.3 AU from the Sun and 43.3 AU from the Earth.
Apparent velocity is 23.4 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 1101 seconds.
The 1-sigma cross-track error in the shadow position is 5287 km.

The object has an absolute magnitude Hv=5.5
Diameter=457.1 km assuming a 5% albedo -- 20.4 sec chord
Diameter=186.6 km assuming a 30% albedo -- 8.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 307251, (2029/07/08 21:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:13.3 -26:29:41  0.9 18.71 175
34Ups Sco      17:32:46.4 -37:18:58  2.7 10.15 164
3 Sgr          17:49:25.2 -27:50:21  4.2  1.37 167
PPM 267436     17:54:02.9 -28:27:22  8.4  0.29 166
PPM 267466     17:55:13.0 -28:03:41  8.7  0.26 165
307251         17:55:12.9 -28:19:28  0.0       165
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 307251, (2029/07/08 21:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.71 175
34Ups Sco      17:30:45.8 -37:17:46  2.7 10.15 164
3 Sgr          17:47:33.6 -27:49:51  4.2  1.37 167
PPM 267436     17:52:10.8 -28:27:04  8.4  0.29 166
PPM 267466     17:53:21.2 -28:03:26  8.7  0.26 165
307251         17:53:20.9 -28:19:13  0.0       165
Positions are for J2000

Event circumstances last updated at 2024/06/27 21:04:35 UT

Marc W. Buie, Southwest Research Institute

RECON