RECON: TNO occultation with 04KJ19

Event between 04KJ19 and star GA0780:06722676 with event index number of 1975151

Geocentric closest approach at 2022/05/23 00:45:59 UTC

J2000 position of star is 17:31:48.5 -11:49:00
Equinox of date position of star is 17:33:02.9 -11:49:53
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 74 degrees from the moon. Moon is 47% illuminated.
TNO apparent brightness V=22.6

TNO is 36.3 AU from the Sun and 35.3 AU from the Earth.
The TNO is moving 22.6 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 163 seconds.
The 1-sigma cross-track error in the shadow position is 1762 km.

The TNO has an absolute magnitude Hv=7.0
Diameter=235.5 km assuming a 5% albedo -- 10.4 sec chord
Diameter=96.1 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 04KJ19, (2022/05/23 00:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.0 -26:28:47  0.9 20.71  85
35Eta Oph      17:11:39.8 -15:45:04  2.6  6.51  78
PPM 233365     17:39:24.1 -10:56:16  5.7  1.79  72
PPM 233209     17:33:27.7 -11:57:47  8.3  0.16  74
PPM 233192     17:32:51.1 -11:50:46  9.2  0.05  74
04KJ19         17:33:03.6 -11:49:54 16.3        73
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 04KJ19, (2022/05/23 00:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.71  85
35Eta Oph      17:10:22.7 -15:43:29  2.6  6.51  78
PPM 233365     17:38:09.5 -10:55:35  5.7  1.79  72
PPM 233209     17:32:12.6 -11:56:54  8.3  0.16  74
PPM 233192     17:31:36.0 -11:49:52  9.2  0.05  74
04KJ19         17:31:48.5 -11:49:00 16.3        74
Positions are for J2000

Event circumstances last updated at 2022/03/13 02:12:38 UT

Marc W. Buie, Southwest Research Institute

RECON