RECON: TNO occultation with 444745

Event between (444745) 07JF43 and star GA0780:05249291 with event index number of 280349

Geocentric closest approach at 2020/07/28 08:43:02 UTC

J2000 position of star is 16:26:51.1 -11:28:41
Equinox of date position of star is 16:27:59.3 -11:31:22
Stellar brightness G=16.3, use SENSEUP=128
Star is 21 degrees from the moon. Moon is 60% illuminated.
TNO apparent brightness V=25.8

TNO is 37.0 AU from the Sun and 36.5 AU from the Earth.
The TNO is moving 10.8 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 149 seconds.
The 1-sigma cross-track error in the shadow position is 1411 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=524.8 km assuming a 5% albedo -- 5.6 sec chord
Diameter=214.3 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 444745, (2020/07/28 08:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.3 -26:28:33  0.9 14.97  24
13Zet Oph      16:38:17.6 -10:36:26  2.6  2.69  24
3Ups Oph       16:28:55.0 -08:24:58  4.2  3.12  22
PPM 231692     16:27:27.0 -11:31:53  8.5  0.13  21
PPM 231711     16:28:27.3 -11:28:08  9.5  0.13  21
444745         16:27:59.5 -11:31:23 16.3        21
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, (2020/07/28 08:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.97  24
13Zet Oph      16:37:09.6 -10:34:01  2.6  2.69  24
3Ups Oph       16:27:48.0 -08:22:18  4.2  3.12  22
PPM 231692     16:26:18.5 -11:29:10  8.5  0.13  21
PPM 231711     16:27:19.0 -11:25:27  9.5  0.13  21
444745         16:26:51.1 -11:28:41 16.3        21
Positions are for J2000

Event circumstances last updated at 2020/07/03 21:12:24 UT

Marc W. Buie, Southwest Research Institute

RECON