RECON: TNO occultation with 469506

Event between (469506) 03FF128 and star GA0680:07645222 with event index number of 1237470

Geocentric closest approach at 2022/07/03 00:38:17 UTC

J2000 position of star is 16:48:45.6 -21:50:14
Equinox of date position of star is 16:50:05.2 -21:52:29
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 109 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=21.9

TNO is 31.1 AU from the Sun and 30.2 AU from the Earth.
The TNO is moving 20.2 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 154 seconds.
The 1-sigma cross-track error in the shadow position is 1191 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=254.7 km assuming a 5% albedo -- 12.6 sec chord
Diameter=104.0 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 469506, (2022/07/03 00:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.4 -26:28:48  0.9  6.37 106
23Tau Sco      16:37:17.2 -28:15:39  2.8  7.01 108
PPM 266088     16:54:45.1 -20:27:05  5.7  1.79 110
PPM 266012     16:50:55.7 -21:53:24  7.4  0.19 110
PPM 265989     16:49:57.0 -21:58:45  9.1  0.11 109
469506         16:50:06.3 -21:52:31 15.9       110
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 469506, (2022/07/03 00:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  6.37 106
23Tau Sco      16:35:52.9 -28:12:58  2.8  7.01 108
PPM 266088     16:53:25.2 -20:24:57  5.7  1.79 110
PPM 266012     16:49:35.0 -21:51:09  7.4  0.19 110
PPM 265989     16:48:36.3 -21:56:28  9.1  0.11 109
469506         16:48:45.6 -21:50:14 15.9       109
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:05:48 UT

Marc W. Buie, Southwest Research Institute

RECON