RECON: TNO occultation with 528219

Event between (528219) 08KV42 and star GA1360:04593437 with event index number of 1597004

Geocentric closest approach at 2021/01/09 07:51:44 UTC

J2000 position of star is 16:32:31.2 +47:52:46
Equinox of date position of star is 16:33:06.9 +47:50:10
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 67 degrees from the moon. Moon is 19% illuminated.
TNO apparent brightness V=23.1

TNO is 25.2 AU from the Sun and 25.3 AU from the Earth.
The TNO is moving 31.9 km/sec on the sky relative to the star, or, 6.2 arcsec/hr.
The 1-sigma error in the time of the event is 29 seconds.
The 1-sigma cross-track error in the shadow position is 919 km.

The TNO has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 3.3 sec chord
Diameter=42.8 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 
 
 

Star training set for 528219, (2021/01/09 07:52UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:39.1 +38:48:15  0.0 24.18  69
23Bet Dra      17:30:54.5 +52:17:12  2.8 10.26  74
34 Her         16:30:40.8 +48:54:59  6.2  1.15  68
PPM 055463     16:30:50.6 +47:54:23  7.5  0.39  67
PPM 055504     16:34:16.7 +47:50:53  9.2  0.20  67
528219         16:33:07.0 +47:50:09 16.8        67
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 528219, (2021/01/09 07:52UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 24.18  69
23Bet Dra      17:30:25.9 +52:18:05  2.8 10.26  74
34 Her         16:30:05.9 +48:57:40  6.2  1.15  68
PPM 055463     16:30:14.7 +47:57:03  7.5  0.39  67
PPM 055504     16:33:40.9 +47:53:27  9.2  0.20  67
528219         16:32:31.2 +47:52:46 16.8        67
Positions are for J2000

Event circumstances last updated at 2020/12/23 00:27:23 UT

Marc W. Buie, Southwest Research Institute

RECON