RECON: TNO occultation with 04KF19

Event between 04KF19 and star GA0660:08330950 with event index number of 2008482

Geocentric closest approach at 2023/06/22 03:08:44 UTC

J2000 position of star is 16:54:17.3 -22:41:13
Equinox of date position of star is 16:55:41.5 -22:43:24
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 120 degrees from the moon. Moon is 14% illuminated.
Apparent brightness V=23.0

Object is 41.4 AU from the Sun and 40.4 AU from the Earth.
Apparent velocity is 23.5 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 652 seconds.
The 1-sigma cross-track error in the shadow position is 3600 km.

The object has an absolute magnitude Hv=6.8
Diameter=257.0 km assuming a 5% albedo -- 10.9 sec chord
Diameter=104.9 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 04KF19, (2023/06/22 03:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.0 -26:28:55  0.9  6.78 116
23Tau Sco      16:37:20.9 -28:15:46  2.8  6.91 117
PPM 266088     16:54:48.6 -20:27:10  5.7  2.28 120
PPM 266120     16:56:02.7 -21:54:58  8.4  0.81 120
PPM 266124     16:56:10.2 -22:52:57  9.1  0.19 120
04KF19         16:55:42.1 -22:43:25 16.9       121
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, (2023/06/22 03:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  6.78 116
23Tau Sco      16:35:52.9 -28:12:58  2.8  6.91 117
PPM 266088     16:53:25.2 -20:24:57  5.7  2.28 120
PPM 266120     16:54:38.4 -21:52:47  8.4  0.81 120
PPM 266124     16:54:45.3 -22:50:46  9.1  0.19 120
04KF19         16:54:17.3 -22:41:13 16.9       120
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:27:42 UT

Marc W. Buie, Southwest Research Institute

RECON