RECON: TNO occultation with 00CK105

Event between 00CK105 and star GA1000:03415051 with event index number of 1060044

Geocentric closest approach at 2021/03/10 19:26:15 UTC

J2000 position of star is 10:10:46.5 +10:30:27
Equinox of date position of star is 10:11:53.6 +10:24:11
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 168 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=23.0

TNO is 48.2 AU from the Sun and 47.3 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 345 seconds.
The 1-sigma cross-track error in the shadow position is 5885 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=338.9 km assuming a 5% albedo -- 13.7 sec chord
Diameter=138.3 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 00CK105, (2021/03/10 19:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:29.9 +11:51:46  1.3  1.57 169
31 Leo         10:09:01.6 +09:53:34  6.0  0.87 168
PPM 127148     10:10:25.7 +10:34:42  9.8  0.40 168
PPM 127180     10:12:18.5 +10:22:40 10.9  0.10 167
00CK105        10:11:54.0 +10:24:09 15.4       167
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 00CK105, (2021/03/10 19:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  1.57 169
31 Leo         10:07:54.2 +09:59:50  6.0  0.87 168
PPM 127148     10:09:18.1 +10:40:58  9.8  0.40 168
PPM 127180     10:11:10.9 +10:28:59 10.9  0.10 167
00CK105        10:10:46.5 +10:30:27 15.4       168
Positions are for J2000

Event circumstances last updated at 2021/01/19 21:00:52 UT

Marc W. Buie, Southwest Research Institute

RECON