RECON: TNO occultation with 600217

Event between (600217) 11QY100 and star GA0860:01305819 with event index number of 2730011

Geocentric closest approach at 2022/10/01 22:14:29 UTC

J2000 position of star is 06:25:32.1 -02:17:26
Equinox of date position of star is 06:26:38.3 -02:18:16
Stellar brightness G=13.2, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 149 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=21.4

TNO is 19.7 AU from the Sun and 19.7 AU from the Earth.
The TNO is moving 14.0 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 59 seconds.
The 1-sigma cross-track error in the shadow position is 1071 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=137.4 km assuming a 5% albedo -- 9.8 sec chord
Diameter=56.1 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 600217, (2022/10/01 22:14UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:24.3 +07:24:34  0.4 12.30 160
Saiph          05:48:50.2 -09:39:48  2.1 11.94 143
PPM 176266     06:27:48.7 -01:31:21  5.9  0.83 149
PPM 176257     06:27:08.0 -01:49:42  8.5  0.49 149
PPM 176259     06:27:11.9 -02:28:19  8.7  0.21 148
600217         06:26:40.8 -02:18:18 13.2       148
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 600217, (2022/10/01 22:14UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 12.30 160
Saiph          05:47:45.4 -09:40:11  2.1 11.94 143
PPM 176266     06:26:39.6 -01:30:27  5.9  0.83 149
PPM 176257     06:25:59.0 -01:48:49  8.5  0.49 149
PPM 176259     06:26:03.2 -02:27:26  8.7  0.21 148
600217         06:25:32.1 -02:17:26 13.2       149
Positions are for J2000

Event circumstances last updated at 2021/12/02 01:02:16 UT

Marc W. Buie, Southwest Research Institute

RECON