RECON: TNO occultation with 528219

Event between (528219) 08KV42 and star GA1360:04564518 with event index number of 1596996

Geocentric closest approach at 2020/10/20 16:41:14 UTC

J2000 position of star is 16:16:28.4 +47:20:27
Equinox of date position of star is 16:17:05.0 +47:17:27
Stellar brightness G=16.9, use SENSEUP=128
Star is 72 degrees from the moon. Moon is 21% illuminated.
TNO apparent brightness V=24.3

TNO is 25.3 AU from the Sun and 25.7 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 62 seconds.
The 1-sigma cross-track error in the shadow position is 2192 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=104.7 km assuming a 5% albedo -- 2.4 sec chord
Diameter=42.8 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 528219, (2020/10/20 16:41UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:38.6 +38:48:15  0.0 26.78  64
23Bet Dra      17:30:54.2 +52:17:12  2.8 12.87  76
22Tau Her      16:20:22.0 +46:15:53  3.9  1.17  71
PPM 055381     16:23:44.9 +47:34:58  8.3  1.16  72
PPM 055300     16:15:49.1 +46:59:21  8.8  0.37  72
PPM 055321     16:17:59.5 +47:16:46 10.8  0.15  72
528219         16:17:05.2 +47:17:26 16.9        72
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, (2020/10/20 16:41UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 26.78  64
23Bet Dra      17:30:25.9 +52:18:05  2.8 12.87  76
22Tau Her      16:19:44.4 +46:18:49  3.9  1.17  71
PPM 055381     16:23:08.8 +47:37:49  8.3  1.16  72
PPM 055300     16:15:11.9 +47:02:25  8.8  0.37  72
PPM 055321     16:17:22.7 +47:19:46 10.8  0.15  72
528219         16:16:28.4 +47:20:27 16.9        72
Positions are for J2000

Event circumstances last updated at 2020/08/28 21:43:47 UT

Marc W. Buie, Southwest Research Institute

RECON