RECON: TNO occultation with 03HM57

Event between 03HM57 and star UC4-297-089836 with event index number of 161824

Geocentric closest approach at 2018/07/05 13:27:18 UTC

J2000 position of star is 16:13:17.8 -30:37:01
Equinox of date position of star is 16:14:23.3 -30:39:36
Stellar brightness R=13.1, use SENSEUP=32
Star is 116 degrees from the moon. Moon is 58% illuminated.
TNO apparent brightness V=20.9

TNO is 16.8 AU from the Sun and 16.0 AU from the Earth.
The TNO is moving 15.4 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 308 seconds.
The 1-sigma cross-track error in the shadow position is 4787 km.

The TNO has an absolute magnitude Hv=8.5
Diameter=119.7 km assuming a 5% albedo -- 7.7 sec chord
Diameter=48.9 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 03HM57, (2018/07/05 13:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.7 -26:28:17  0.9  5.48 114
23Tau Sco      16:37:02.3 -28:15:10  2.8  5.47 112
PPM 265228     16:12:11.3 -29:27:49  5.2  1.30 117
PPM 294793     16:13:49.5 -30:11:54  8.5  0.48 117
PPM 294803     16:14:10.5 -30:33:57  9.8  0.12 116
03HM57         16:14:27.8 -30:39:46 13.1       116
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 03HM57, (2018/07/05 13:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9  5.48 114
23Tau Sco      16:35:53.0 -28:12:58  2.8  5.47 112
PPM 265228     16:11:01.9 -29:25:00  5.2  1.30 117
PPM 294793     16:12:39.7 -30:09:08  8.5  0.48 117
PPM 294803     16:13:00.6 -30:31:11  9.8  0.12 116
03HM57         16:13:17.8 -30:37:01 13.1       116
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:29:02 UT

Marc W. Buie, Southwest Research Institute

RECON