RECON: TNO occultation with 03YJ179

Event between 03YJ179 and star GA1140:02211330 with event index number of 2006515

Geocentric closest approach at 2024/02/05 23:24:00 UTC

J2000 position of star is 06:25:37.5 +24:38:54
Equinox of date position of star is 06:27:05.3 +24:37:59
Stellar brightness G=12.4, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 166 degrees from the moon. Moon is 21% illuminated.
Apparent brightness V=23.0

Object is 40.4 AU from the Sun and 39.6 AU from the Earth.
Apparent velocity is 18.3 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 760 seconds.
The 1-sigma cross-track error in the shadow position is 1492 km.

The object has an absolute magnitude Hv=6.9
Diameter=247.8 km assuming a 5% albedo -- 13.5 sec chord
Diameter=101.1 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 03YJ179, (2024/02/05 23:24UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:47.4 +27:57:58  1.1 18.15 150
Alhena         06:39:06.2 +16:22:36  1.9  8.72 160
PPM 095919     06:26:12.8 +25:02:02  6.3  0.45 167
PPM 095926     06:26:29.5 +24:17:13  8.5  0.37 166
PPM 095966     06:27:46.1 +24:42:01  9.4  0.17 166
03YJ179        06:27:06.2 +24:37:58 12.4       166
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 03YJ179, (2024/02/05 23:24UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 18.15 150
Alhena         06:37:42.8 +16:23:57  1.9  8.72 160
PPM 095919     06:24:43.7 +25:02:55  6.3  0.45 167
PPM 095926     06:25:00.9 +24:18:07  8.5  0.37 166
PPM 095966     06:26:17.3 +24:42:58  9.4  0.17 166
03YJ179        06:25:37.5 +24:38:54 12.4       166
Positions are for J2000

Event circumstances last updated at 2023/11/04 04:09:06 UT

Marc W. Buie, Southwest Research Institute

RECON