RECON: TNO occultation with 444745

Event between (444745) 07JF43 and star UC4-393-065902 with event index number of 210202

Geocentric closest approach at 2019/08/06 02:48:33 UTC

J2000 position of star is 16:19:56.2 -11:33:33
Equinox of date position of star is 16:20:55.8 -11:36:04
Stellar brightness R=15.7, use SENSEUP=128
Star is 43 degrees from the moon. Moon is 32% illuminated.
TNO apparent brightness V=21.1

TNO is 37.2 AU from the Sun and 36.8 AU from the Earth.
The TNO is moving 6.9 km/sec on the sky relative to the star, or, 0.9 arcsec/hr.
The 1-sigma error in the time of the event is 244 seconds.
The 1-sigma cross-track error in the shadow position is 1682 km.

The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 75.6 sec chord
Diameter=214.3 km assuming a 30% albedo -- 30.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 444745, (2019/08/06 02:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.7 -26:28:26  0.9 15.04  48
13Zet Oph      16:38:14.4 -10:36:19  2.6  4.34  47
15Psi Sco      16:13:04.4 -10:06:49  4.9  2.46  40
PPM 231649     16:25:17.3 -11:56:31  8.0  1.10  44
PPM 231552     16:21:32.6 -11:34:42  9.6  0.13  43
444745         16:21:01.3 -11:36:18 15.7        43
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, (2019/08/06 02:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.04  48
13Zet Oph      16:37:09.6 -10:34:01  2.6  4.34  47
15Psi Sco      16:12:00.0 -10:03:51  4.9  2.46  40
PPM 231649     16:24:12.0 -11:53:53  8.0  1.10  44
PPM 231552     16:20:27.5 -11:31:57  9.6  0.13  43
444745         16:19:56.2 -11:33:33 15.7        42
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:11:24 UT

Marc W. Buie, Southwest Research Institute

RECON