RECON: TNO occultation with 500886

Event between (500886) 13JN65 and star GA0720:06072477 with event index number of 253372

Geocentric closest approach at 2020/04/01 05:48:15 UTC

J2000 position of star is 16:20:56.8 -16:05:33
Equinox of date position of star is 16:22:00.0 -16:08:07
Stellar brightness G=16.7, use SENSEUP=128
Star is 146 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=23.6

TNO is 41.2 AU from the Sun and 40.6 AU from the Earth.
The TNO is moving 12.6 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 225 seconds.
The 1-sigma cross-track error in the shadow position is 1998 km.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 15.9 sec chord
Diameter=81.5 km assuming a 30% albedo -- 6.5 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 500886, (2020/04/01 05:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.1 -26:28:31  0.9 10.53 150
8Bet1Sco       16:06:37.1 -19:51:33  2.6  5.23 143
PPM 231511     16:20:09.1 -14:55:14  5.8  1.31 145
PPM 231529     16:20:45.4 -16:57:50  8.5  0.89 146
PPM 231542     16:21:18.9 -15:59:17  9.9  0.24 146
500886         16:22:06.2 -16:08:22 16.7       146
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 500886, (2020/04/01 05:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.53 150
8Bet1Sco       16:05:26.2 -19:48:20  2.6  5.23 143
PPM 231511     16:19:00.4 -14:52:22  5.8  1.31 145
PPM 231529     16:19:35.7 -16:54:58  8.5  0.89 146
PPM 231542     16:20:09.6 -15:56:27  9.9  0.24 146
500886         16:20:56.8 -16:05:33 16.7       146
Positions are for J2000

Event circumstances last updated at 2018/06/12 19:58:03 UT

Marc W. Buie, Southwest Research Institute

RECON