RECON: TNO occultation with 04KF19

Event between 04KF19 and star GA0660:08719023 with event index number of 2008442

Geocentric closest approach at 2023/02/06 18:17:22 UTC

J2000 position of star is 16:58:50.3 -22:47:54
Equinox of date position of star is 17:00:13.6 -22:49:54
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 107 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=23.1

Object is 41.4 AU from the Sun and 41.8 AU from the Earth.
Apparent velocity is 19.4 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 868 seconds.
The 1-sigma cross-track error in the shadow position is 2397 km.

The object has an absolute magnitude Hv=6.8
Diameter=257.0 km assuming a 5% albedo -- 13.2 sec chord
Diameter=104.9 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 04KF19, (2023/02/06 18:17UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:49.7 -26:28:53  0.9  7.61 102
23Tau Sco      16:37:19.5 -28:15:43  2.8  7.49 103
PPM 266403     17:07:34.7 -21:35:41  6.3  2.10 109
PPM 266304     17:03:32.6 -23:19:12  8.4  0.91 108
PPM 266229     17:00:41.2 -22:42:08  9.4  0.17 107
04KF19         17:00:13.9 -22:49:54 14.2       108
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 04KF19, (2023/02/06 18:17UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.61 102
23Tau Sco      16:35:52.9 -28:12:58  2.8  7.49 103
PPM 266403     17:06:11.8 -21:33:54  6.3  2.10 109
PPM 266304     17:02:08.7 -23:17:18  8.4  0.91 108
PPM 266229     16:59:17.7 -22:40:08  9.4  0.17 107
04KF19         16:58:50.3 -22:47:54 14.2       107
Positions are for J2000

Event circumstances last updated at 2023/01/07 03:18:30 UT

Marc W. Buie, Southwest Research Institute

RECON