RECON: TNO occultation with 15DX224

Event between 15DX224 and star GA0880:04377670 with event index number of 200178

Geocentric closest approach at 2019/04/01 14:30:55 UTC

J2000 position of star is 14:55:32.3 -01:38:02
Equinox of date position of star is 14:56:31.6 -01:42:38
Stellar brightness G=15.0, use SENSEUP=128
Star is 108 degrees from the moon. Moon is 13% illuminated.
TNO apparent brightness V=22.3

TNO is 36.4 AU from the Sun and 35.5 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 113 seconds.
The 1-sigma cross-track error in the shadow position is 1724 km.

The TNO has an absolute magnitude Hv=6.6
Diameter=293.8 km assuming a 5% albedo -- 14.9 sec chord
Diameter=119.9 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 15DX224, (2019/04/01 14:31UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:32.4 +19:04:59  0.0 23.00 122
27Bet Lib      15:18:02.7 -09:27:10  2.6  9.41 101
11 Lib         14:52:01.1 -02:22:42  6.0  1.31 109
PPM 179429     14:56:35.5 -01:31:37  9.7  0.18 108
15DX224        14:56:32.0 -01:42:40 15.0       108
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 15DX224, (2019/04/01 14:31UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.2 +19:10:19  0.0 23.00 122
27Bet Lib      15:17:00.3 -09:22:59  2.6  9.41 101
11 Lib         14:51:01.2 -02:17:59  6.0  1.31 109
PPM 179429     14:55:35.9 -01:27:00  9.7  0.18 108
15DX224        14:55:32.3 -01:38:02 15.0       108
Positions are for J2000

Event circumstances last updated at 2019/02/12 07:06:06 UT

Marc W. Buie, Southwest Research Institute

RECON