RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0600:13180797 with event index number of 1103792

Geocentric closest approach at 2022/05/07 18:34:52 UTC

J2000 position of star is 17:00:48.0 -28:15:22
Equinox of date position of star is 17:02:11.7 -28:17:14
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 134 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=20.5

TNO is 16.5 AU from the Sun and 15.7 AU from the Earth.
The TNO is moving 16.9 km/sec on the sky relative to the star, or, 5.4 arcsec/hr.
The 1-sigma error in the time of the event is 67 seconds.
The 1-sigma cross-track error in the shadow position is 610 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 8.0 sec chord
Diameter=55.6 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 469442, (2022/05/07 18:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.9 -26:28:47  0.9  7.20 127
23Tau Sco      16:37:16.7 -28:15:38  2.8  5.49 128
PPM 266416     17:08:16.5 -26:32:29  6.3  2.21 135
PPM 266270     17:02:27.7 -28:35:04  7.6  0.30 134
PPM 266278     17:02:40.3 -28:10:17  9.4  0.16 134
469442         17:02:12.3 -28:17:15 15.0       134
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 469442, (2022/05/07 18:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.20 127
23Tau Sco      16:35:52.9 -28:12:58  2.8  5.49 128
PPM 266416     17:06:53.2 -26:30:47  6.3  2.21 135
PPM 266270     17:01:03.3 -28:33:12  7.6  0.30 134
PPM 266278     17:01:16.1 -28:08:25  9.4  0.16 134
469442         17:00:48.0 -28:15:22 15.0       134
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:01:46 UT

Marc W. Buie, Southwest Research Institute

RECON