RECON: TNO occultation with 533507

Event between (533507) 14HV199 and star GA0820:04885390 with event index number of 1608397

Geocentric closest approach at 2020/04/16 12:27:29 UTC

J2000 position of star is 15:53:52.6 -06:29:53
Equinox of date position of star is 15:54:55.1 -06:33:17
Stellar brightness G=16.1, use SENSEUP=128
Star is 78 degrees from the moon. Moon is 35% illuminated.
TNO apparent brightness V=22.3

TNO is 38.5 AU from the Sun and 37.7 AU from the Earth.
The TNO is moving 20.8 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 139 seconds.
The 1-sigma cross-track error in the shadow position is 2242 km.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 15.2 sec chord
Diameter=129.1 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 533507, (2020/04/16 12:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.3 -26:28:31  0.9 21.66  65
1Del Oph       16:15:24.7 -03:44:42  2.7  5.82  74
PPM 198946     15:47:50.2 -06:10:56  6.5  1.81  80
PPM 199115     15:58:12.6 -06:53:09  8.2  0.87  77
PPM 199046     15:54:24.0 -06:46:03  9.5  0.25  78
533507         15:54:57.6 -06:33:25 16.1        78
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 533507, (2020/04/16 12:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.66  65
1Del Oph       16:14:20.7 -03:41:42  2.7  5.82  74
PPM 198946     15:46:45.4 -06:07:13  6.5  1.81  80
PPM 199115     15:57:07.4 -06:49:42  8.2  0.87  77
PPM 199046     15:53:18.9 -06:42:30  9.5  0.25  78
533507         15:53:52.6 -06:29:53 16.1        78
Positions are for J2000

Event circumstances last updated at 2019/07/02 02:36:09 UT

Marc W. Buie, Southwest Research Institute

RECON