RECON: TNO occultation with 06CH69

Event between 06CH69 and star GA1000:03446949 with event index number of 1941023

Geocentric closest approach at 2022/12/26 23:46:27 UTC

J2000 position of star is 10:33:33.9 +10:51:12
Equinox of date position of star is 10:34:42.8 +10:44:27
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 169 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=23.1

TNO is 44.6 AU from the Sun and 44.1 AU from the Earth.
The TNO is moving 10.2 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 739 seconds.
The 1-sigma cross-track error in the shadow position is 4970 km.

The TNO has an absolute magnitude Hv=6.5
Diameter=270.4 km assuming a 5% albedo -- 29.4 sec chord
Diameter=110.4 km assuming a 30% albedo -- 12.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 06CH69, (2022/12/26 23:44UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:35.7 +11:51:14  1.3  6.27 174
47Rho Leo      10:34:01.2 +09:11:15  3.8  1.56 168
PPM 127478     10:32:45.4 +11:02:58  8.3  0.59 169
PPM 127528     10:36:38.2 +10:48:48  9.7  0.46 168
06CH69         10:34:46.7 +10:44:04 16.8       168
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 06CH69, (2022/12/26 23:44UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  6.27 174
47Rho Leo      10:32:48.7 +09:18:24  3.8  1.56 168
PPM 127478     10:31:32.4 +11:10:05  8.3  0.59 169
PPM 127528     10:35:25.4 +10:55:58  9.7  0.46 168
06CH69         10:33:33.9 +10:51:12 16.8       169
Positions are for J2000

Event circumstances last updated at 2021/10/05 01:25:11 UT

Marc W. Buie, Southwest Research Institute

RECON