RECON: TNO occultation with 505624

Event between (505624) 14GU53 and star GA0900:04553861 with event index number of 266285

Geocentric closest approach at 2020/05/21 14:11:33 UTC

J2000 position of star is 16:20:23.7 +00:49:59
Equinox of date position of star is 16:21:20.1 +00:47:24
Stellar brightness G=15.3, use SENSEUP=128
Star is 157 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.4

TNO is 38.2 AU from the Sun and 37.2 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 83 seconds.
The 1-sigma cross-track error in the shadow position is 1425 km.

The TNO has an absolute magnitude Hv=5.6
Diameter=457.1 km assuming a 5% albedo -- 18.7 sec chord
Diameter=186.6 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 505624, (2020/05/21 14:12UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.6 -26:28:32  0.9 27.35 157
1Del Oph       16:15:25.0 -03:44:43  2.7  4.77 160
12 Oph         16:37:25.8 -02:21:59  5.8  5.09 155
PPM 162546     16:23:15.4 +00:27:05  8.4  0.56 156
PPM 162504     16:21:25.5 +00:52:09  9.5  0.08 156
505624         16:21:26.1 +00:47:07 15.3       156
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 505624, (2020/05/21 14:12UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 27.35 157
1Del Oph       16:14:20.7 -03:41:42  2.7  4.77 160
12 Oph         16:36:22.0 -02:19:34  5.8  5.09 155
PPM 162546     16:22:12.9 +00:29:54  8.4  0.56 156
PPM 162504     16:20:23.2 +00:55:00  9.5  0.08 156
505624         16:20:23.7 +00:49:59 15.3       156
Positions are for J2000

Event circumstances last updated at 2018/06/04 17:13:29 UT

Marc W. Buie, Southwest Research Institute

RECON