RECON: TNO occultation with 328884

Event between (328884) 10LJ109 and star GA0420:29492814 with event index number of 278855

Geocentric closest approach at 2020/07/24 05:22:24 UTC

J2000 position of star is 19:42:51.2 -46:45:42
Equinox of date position of star is 19:44:12.1 -46:43:00
Stellar brightness G=13.9, use SENSEUP=64
Star is 121 degrees from the moon. Moon is 15% illuminated.
TNO apparent brightness V=21.6

TNO is 13.7 AU from the Sun and 12.8 AU from the Earth.
The TNO is moving 21.2 km/sec on the sky relative to the star, or, 8.2 arcsec/hr.
The 1-sigma error in the time of the event is 359 seconds.
The 1-sigma cross-track error in the shadow position is 1220 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.0 km assuming a 5% albedo -- 2.6 sec chord
Diameter=22.4 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 328884, (2020/07/24 05:22UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:46.9 -29:30:46  1.2 41.14 159
38Zet Sgr      19:03:55.1 -29:50:56  2.7 18.60 116
PPM 325524     19:51:43.9 -47:30:15  5.6  1.49 121
PPM 325332     19:41:17.5 -46:08:03  8.4  0.78 120
PPM 325408     19:45:10.1 -46:36:19  8.7  0.18 121
328884         19:44:20.7 -46:42:42 13.9       121
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 328884, (2020/07/24 05:22UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 41.14 159
38Zet Sgr      19:02:36.7 -29:52:49  2.7 18.60 116
PPM 325524     19:50:14.1 -47:33:27  5.6  1.49 121
PPM 325332     19:39:48.4 -46:10:58  8.4  0.78 120
PPM 325408     19:43:40.8 -46:39:20  8.7  0.18 121
328884         19:42:51.2 -46:45:42 13.9       121
Positions are for J2000

Event circumstances last updated at 2018/08/01 17:58:45 UT

Marc W. Buie, Southwest Research Institute

RECON