RECON: TNO occultation with 444745

Event between (444745) 07JF43 and star GA0780:05184483 with event index number of 213404

Geocentric closest approach at 2019/09/22 13:39:58 UTC

J2000 position of star is 16:20:46.5 -11:45:27
Equinox of date position of star is 16:21:51.2 -11:48:09
Stellar brightness G=15.8, use SENSEUP=128
Star is 149 degrees from the moon. Moon is 45% illuminated.
TNO apparent brightness V=21.2

TNO is 37.1 AU from the Sun and 37.5 AU from the Earth.
The TNO is moving 17.5 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 140 seconds.
The 1-sigma cross-track error in the shadow position is 1562 km.

The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 30.0 sec chord
Diameter=214.3 km assuming a 30% albedo -- 12.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 444745, (2019/09/22 13:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:37.2 -26:28:27  0.9 14.81 154
13Zet Oph      16:38:14.8 -10:36:20  2.6  4.19 152
15Psi Sco      16:13:04.8 -10:06:50  4.9  2.74 147
PPM 231649     16:25:17.7 -11:56:32  8.0  0.85 150
PPM 231546     16:21:20.9 -12:00:07  9.3  0.24 149
444745         16:21:52.2 -11:48:12 15.8       150
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 444745, (2019/09/22 13:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.81 154
13Zet Oph      16:37:09.6 -10:34:01  2.6  4.19 152
15Psi Sco      16:12:00.0 -10:03:51  4.9  2.74 147
PPM 231649     16:24:12.0 -11:53:53  8.0  0.85 150
PPM 231546     16:20:15.2 -11:57:22  9.3  0.24 149
444745         16:20:46.5 -11:45:27 15.8       149
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:40:48 UT

Marc W. Buie, Southwest Research Institute

RECON