RECON: TNO occultation with 307251

Event between (307251) 02KW14 and star GA0620:17201897 with event index number of 2296252

Geocentric closest approach at 2024/10/13 14:38:21 UTC

J2000 position of star is 17:23:38.8 -27:01:15
Equinox of date position of star is 17:25:10.4 -27:02:30
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 65 degrees from the moon. Moon is 79% illuminated.
Apparent brightness V=22.0

Object is 43.4 AU from the Sun and 43.8 AU from the Earth.
Apparent velocity is 19.3 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 800 seconds.
The 1-sigma cross-track error in the shadow position is 4002 km.

The object has an absolute magnitude Hv=5.5
Diameter=457.1 km assuming a 5% albedo -- 24.7 sec chord
Diameter=186.6 km assuming a 30% albedo -- 10.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 307251, (2024/10/13 14:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:55.9 -26:29:05  0.9 12.12  77
26Eps Sco      16:51:46.6 -34:20:09  2.3 10.23  71
43 Oph         17:24:55.3 -28:09:52  5.1  1.12  65
PPM 266726     17:22:38.8 -27:26:27  7.6  0.69  65
PPM 266823     17:26:07.7 -26:56:44  9.0  0.23  65
307251         17:25:11.7 -27:02:31 16.0        64
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, (2024/10/13 14:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.12  77
26Eps Sco      16:50:08.8 -34:17:41  2.3 10.23  71
43 Oph         17:23:21.6 -28:08:35  5.1  1.12  65
PPM 266726     17:21:05.6 -27:25:05  7.6  0.69  65
PPM 266823     17:24:34.8 -26:55:29  9.0  0.23  65
307251         17:23:38.8 -27:01:15 16.0        65
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:51:04 UT

Marc W. Buie, Southwest Research Institute

RECON