RECON: TNO occultation with 83982

Event between (83982) Crantor and star GA0700:34577787 with event index number of 273103

Geocentric closest approach at 2020/06/11 15:39:08 UTC

J2000 position of star is 21:36:38.6 -19:06:54
Equinox of date position of star is 21:37:40.4 -19:01:53
Stellar brightness G=14.1, use SENSEUP=64
Star is 13 degrees from the moon. Moon is 66% illuminated.
TNO apparent brightness V=21.9

TNO is 19.6 AU from the Sun and 19.1 AU from the Earth.
The TNO is moving 9.2 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 633 seconds.
The 1-sigma cross-track error in the shadow position is 4114 km.

The TNO has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 11.4 sec chord
Diameter=42.8 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 83982, (2020/06/11 15:39UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:46.5 -29:30:48  1.2 21.18  16
39Eps Cap      21:38:13.3 -19:22:24  4.6  0.37  13
PPM 239109     21:38:46.1 -19:08:18  7.9  0.26  13
PPM 239071     21:37:20.2 -18:53:04  9.8  0.17  13
83982          21:37:47.0 -19:01:21 14.1        13
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 83982, (2020/06/11 15:39UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 21.18  16
39Eps Cap      21:37:04.9 -19:27:57  4.6  0.37  13
PPM 239109     21:37:37.7 -19:13:52  7.9  0.26  13
PPM 239071     21:36:11.8 -18:58:37  9.8  0.17  13
83982          21:36:38.6 -19:06:54 14.1        13
Positions are for J2000

Event circumstances last updated at 2018/06/25 21:39:01 UT

Marc W. Buie, Southwest Research Institute

RECON