RECON: TNO occultation with 328884

Event between (328884) 10LJ109 and star GA0460:28417435 with event index number of 251627

Geocentric closest approach at 2020/03/31 03:30:24 UTC

J2000 position of star is 19:56:34.0 -43:50:38
Equinox of date position of star is 19:57:51.3 -43:47:37
Stellar brightness G=16.9, use SENSEUP=128
Star is 145 degrees from the moon. Moon is 37% illuminated.
TNO apparent brightness V=21.9

TNO is 13.5 AU from the Sun and 13.6 AU from the Earth.
The TNO is moving 18.6 km/sec on the sky relative to the star, or, 6.7 arcsec/hr.
The 1-sigma error in the time of the event is 388 seconds.
The 1-sigma cross-track error in the shadow position is 3325 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.0 km assuming a 5% albedo -- 3.0 sec chord
Diameter=22.4 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 328884, (2020/03/31 03:30UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:45.9 -29:30:52  1.2 38.41 110
38Zet Sgr      19:03:53.9 -29:50:58  2.7 17.60 160
PPM 325731     20:02:14.0 -45:03:22  5.8  1.48 144
PPM 325641     19:57:30.3 -43:57:26  7.4  0.19 145
328884         19:57:58.9 -43:47:20 16.9       145
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, (2020/03/31 03:30UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 38.41 110
38Zet Sgr      19:02:36.7 -29:52:49  2.7 17.60 160
PPM 325731     20:00:48.3 -45:06:47  5.8  1.48 144
PPM 325641     19:56:05.2 -44:00:44  7.4  0.19 145
328884         19:56:34.0 -43:50:38 16.9       145
Positions are for J2000

Event circumstances last updated at 2018/06/12 19:57:59 UT

Marc W. Buie, Southwest Research Institute

RECON