RECON: TNO occultation with 500881

Event between (500881) 13JM64 and star GA0740:06245768 with event index number of 221105

Geocentric closest approach at 2019/06/05 01:15:26 UTC

J2000 position of star is 16:41:29.8 -14:41:49
Equinox of date position of star is 16:42:32.6 -14:43:53
Stellar brightness G=17.4, use SENSEUP=128
Star is 155 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=24.3

TNO is 40.7 AU from the Sun and 39.7 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 151 seconds.
The 1-sigma cross-track error in the shadow position is 1601 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 5.6 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 500881, (2019/06/05 01:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:24  0.9 12.07 154
13Zet Oph      16:38:13.8 -10:36:18  2.6  4.26 152
PPM 232182     16:49:33.3 -14:56:33  6.2  1.69 157
PPM 232071     16:44:30.3 -14:54:24  8.5  0.49 155
PPM 232016     16:42:17.0 -14:46:41  9.4  0.09 155
500881         16:42:35.9 -14:43:59 17.4       155
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 500881, (2019/06/05 01:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.07 154
13Zet Oph      16:37:09.6 -10:34:01  2.6  4.26 152
PPM 232182     16:48:27.0 -14:54:34  6.2  1.69 157
PPM 232071     16:43:24.0 -14:52:18  8.5  0.49 155
PPM 232016     16:41:10.9 -14:44:31  9.4  0.09 155
500881         16:41:29.8 -14:41:49 17.4       155
Positions are for J2000

Event circumstances last updated at 2018/06/11 23:20:07 UT

Marc W. Buie, Southwest Research Institute

RECON