RECON: TNO occultation with 19CJ3

Event between 19CJ3 and star GA1100:03272595 with event index number of 2354142

Geocentric closest approach at 2023/06/16 09:38:11 UTC

J2000 position of star is 10:27:50.0 +20:58:48
Equinox of date position of star is 10:29:06.3 +20:51:37
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 86 degrees from the moon. Moon is 3% illuminated.
Apparent brightness V=21.6

Object is 18.0 AU from the Sun and 18.4 AU from the Earth.
Apparent velocity is 17.5 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 47 seconds.
The 1-sigma cross-track error in the shadow position is 700 km.

The object has an absolute magnitude Hv=8.7
Diameter=110.7 km assuming a 5% albedo -- 6.3 sec chord
Diameter=45.2 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 19CJ3, (2023/06/16 09:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:37.2 +11:51:06  1.3 10.15  86
PPM 127411     10:28:16.8 +19:14:39  6.1  1.63  87
PPM 100414     10:31:23.2 +20:40:48  8.4  0.56  87
PPM 100366     10:28:18.9 +20:44:34 10.6  0.22  86
19CJ3          10:29:06.7 +20:51:35 16.9        87
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 19CJ3, (2023/06/16 09:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 10.15  86
PPM 127411     10:27:00.4 +19:21:52  6.1  1.63  87
PPM 100414     10:30:06.6 +20:48:03  8.4  0.56  87
PPM 100366     10:27:02.1 +20:51:47 10.6  0.22  86
19CJ3          10:27:50.0 +20:58:48 16.9        86
Positions are for J2000

Event circumstances last updated at 2023/04/25 03:47:39 UT

Marc W. Buie, Southwest Research Institute

RECON