RECON: TNO occultation with 307251

Event between (307251) 02KW14 and star GA0600:34670908 with event index number of 2754006

Geocentric closest approach at 2029/04/27 06:38:00 UTC

J2000 position of star is 17:58:49.5 -28:15:08
Equinox of date position of star is 18:00:22.4 -28:15:09
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 69 degrees from the moon. Moon is 98% illuminated.
Apparent brightness V=22.0

Object is 44.2 AU from the Sun and 43.6 AU from the Earth.
Apparent velocity is 13.3 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 2013 seconds.
The 1-sigma cross-track error in the shadow position is 4779 km.

The object has an absolute magnitude Hv=5.5
Diameter=457.1 km assuming a 5% albedo -- 35.8 sec chord
Diameter=186.6 km assuming a 30% albedo -- 14.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 307251, (2029/04/27 06:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:12.6 -26:29:40  0.9 19.91  49
34Ups Sco      17:32:45.6 -37:18:58  2.7 10.79  63
Gam1Sgr        18:06:53.6 -29:34:33  4.7  1.90  70
PPM 267596     18:00:30.7 -28:45:34  6.6  0.51  69
PPM 267620     18:01:09.2 -27:57:36  8.7  0.31  69
307251         18:00:40.7 -28:15:09 16.5        69
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, (2029/04/27 06:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.91  49
34Ups Sco      17:30:45.8 -37:17:46  2.7 10.79  63
Gam1Sgr        18:05:01.2 -29:34:48  4.7  1.90  70
PPM 267596     17:58:39.0 -28:45:33  6.6  0.51  69
PPM 267620     17:59:18.3 -27:57:37  8.7  0.31  69
307251         17:58:49.5 -28:15:08 16.5        69
Positions are for J2000

Event circumstances last updated at 2024/06/26 21:34:50 UT

Marc W. Buie, Southwest Research Institute

RECON