RECON: TNO occultation with 500885

Event between (500885) 13JL65 and star UC4-372-078138 with event index number of 221522

Geocentric closest approach at 2019/04/08 05:17:37 UTC

J2000 position of star is 16:57:58.5 -15:37:29
Equinox of date position of star is 16:59:04.2 -15:39:10
Stellar brightness R=16.0, use SENSEUP=128
Star is 156 degrees from the moon. Moon is 8% illuminated.
TNO apparent brightness V=24.7

TNO is 36.1 AU from the Sun and 35.5 AU from the Earth.
The TNO is moving 11.1 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 916 seconds.
The 1-sigma cross-track error in the shadow position is 2375 km.

The TNO has an absolute magnitude Hv=9.0
Diameter=95.5 km assuming a 5% albedo -- 8.6 sec chord
Diameter=39.0 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 500885, (2019/04/08 05:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.5 -26:28:23  0.9 12.69 160
35Eta Oph      17:11:29.1 -15:44:51  2.6  2.99 153
PPM 232348     16:57:08.7 -16:50:07  6.3  1.27 157
PPM 232423     17:00:04.3 -15:50:25  8.4  0.30 156
PPM 232388     16:58:51.0 -15:38:43  9.5  0.06 156
500885         16:59:04.7 -15:39:11 16.0       156
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 500885, (2019/04/08 05:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.69 160
35Eta Oph      17:10:22.7 -15:43:29  2.6  2.99 153
PPM 232348     16:56:02.0 -16:48:22  6.3  1.27 157
PPM 232423     16:58:58.0 -15:48:44  8.4  0.30 156
PPM 232388     16:57:44.9 -15:37:00  9.5  0.06 156
500885         16:57:58.5 -15:37:29 16.0       156
Positions are for J2000

Event circumstances last updated at 2019/02/12 07:11:21 UT

Marc W. Buie, Southwest Research Institute

RECON