RECON: TNO occultation with 52975

Event between (52975) Cyllarus and star UC4-615-042433 with event index number of 181675

Geocentric closest approach at 2019/02/09 18:35:05 UTC

J2000 position of star is 07:49:09.2 +32:50:48
Equinox of date position of star is 07:50:16.8 +32:48:06
Stellar brightness R=14.5, use SENSEUP=128
Star is 100 degrees from the moon. Moon is 20% illuminated.
TNO apparent brightness V=23.9

TNO is 28.0 AU from the Sun and 27.1 AU from the Earth.
The TNO is moving 22.0 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 1175 seconds.
The 1-sigma cross-track error in the shadow position is 3057 km.

The TNO has an absolute magnitude Hv=9.4
Diameter=79.4 km assuming a 5% albedo -- 3.6 sec chord
Diameter=32.4 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 52975, (2019/02/09 18:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:29.0 +27:58:43  1.1  4.89 100
PPM 073167     07:52:15.9 +33:11:03  6.0  0.55 100
PPM 073117     07:49:20.4 +32:48:29  8.2  0.22 100
PPM 073136     07:50:15.5 +32:51:48 10.9  0.07 100
52975          07:50:22.6 +32:47:52 14.5       100
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 52975, (2019/02/09 18:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1  4.89 100
PPM 073167     07:51:02.4 +33:14:02  6.0  0.55 100
PPM 073117     07:48:06.9 +32:51:24  8.2  0.22 100
PPM 073136     07:49:02.1 +32:54:44 10.9  0.07 100
52975          07:49:09.2 +32:50:48 14.5       100
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:04:30 UT

Marc W. Buie, Southwest Research Institute

RECON