RECON: TNO occultation with 04KJ19

Event between 04KJ19 and star GA0780:07250653 with event index number of 1975254

Geocentric closest approach at 2023/02/26 01:37:15 UTC

J2000 position of star is 17:40:49.1 -11:46:57
Equinox of date position of star is 17:42:06.3 -11:47:35
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 145 degrees from the moon. Moon is 37% illuminated.
Apparent brightness V=22.8

Object is 36.2 AU from the Sun and 36.5 AU from the Earth.
Apparent velocity is 16.8 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 252 seconds.
The 1-sigma cross-track error in the shadow position is 2277 km.

The object has an absolute magnitude Hv=7.0
Diameter=235.5 km assuming a 5% albedo -- 14.0 sec chord
Diameter=96.1 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 04KJ19, (2023/02/26 01:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:49.9 -26:28:53  0.9 22.29 162
35Eta Oph      17:11:42.5 -15:45:07  2.6  8.38 153
PPM 233365     17:39:26.7 -10:56:18  5.7  1.08 145
PPM 233417     17:41:11.4 -11:28:37  8.5  0.39 145
PPM 233439     17:42:12.2 -11:32:42  9.6  0.25 145
04KJ19         17:42:06.7 -11:47:35 15.4       145
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, (2023/02/26 01:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.29 162
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.38 153
PPM 233365     17:38:09.5 -10:55:35  5.7  1.08 145
PPM 233417     17:39:53.9 -11:27:58  8.5  0.39 145
PPM 233439     17:40:54.7 -11:32:04  9.6  0.25 145
04KJ19         17:40:49.1 -11:46:57 15.4       145
Positions are for J2000

Event circumstances last updated at 2023/01/07 03:19:06 UT

Marc W. Buie, Southwest Research Institute

RECON