RECON: TNO occultation with 307251

Event between (307251) 02KW14 and star GA0620:17505017 with event index number of 2296224

Geocentric closest approach at 2024/07/08 15:01:51 UTC

J2000 position of star is 17:24:49.2 -27:06:32
Equinox of date position of star is 17:26:20.9 -27:07:45
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 124 degrees from the moon. Moon is 7% illuminated.
Apparent brightness V=21.9

Object is 43.3 AU from the Sun and 42.4 AU from the Earth.
Apparent velocity is 22.1 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 677 seconds.
The 1-sigma cross-track error in the shadow position is 4390 km.

The object has an absolute magnitude Hv=5.5
Diameter=457.1 km assuming a 5% albedo -- 21.5 sec chord
Diameter=186.6 km assuming a 30% albedo -- 8.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 307251, (2024/07/08 15:02UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.9 -26:29:03  0.9 12.38 112
34Ups Sco      17:32:26.0 -37:18:46  2.7 10.26 126
43 Oph         17:24:54.3 -28:09:52  5.1  1.08 124
PPM 266861     17:27:38.2 -27:37:10  7.9  0.57 124
PPM 266823     17:26:06.7 -26:56:43  9.0  0.19 124
307251         17:26:21.2 -27:07:46 16.3       124
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, (2024/07/08 15:02UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.38 112
34Ups Sco      17:30:45.8 -37:17:46  2.7 10.26 126
43 Oph         17:23:21.6 -28:08:35  5.1  1.08 124
PPM 266861     17:26:05.9 -27:36:00  7.9  0.57 124
PPM 266823     17:24:34.8 -26:55:29  9.0  0.19 124
307251         17:24:49.2 -27:06:32 16.3       124
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:47:58 UT

Marc W. Buie, Southwest Research Institute

RECON