RECON: TNO occultation with 500884

Event between (500884) 13JK65 and star TYC26227-02143-1 with event index number of 327417

Geocentric closest approach at 2019/04/19 16:28:24 UTC

J2000 position of star is 17:03:57.0 -19:55:30
Equinox of date position of star is 17:05:03.7 -19:57:01
Stellar brightness V=11.0, use SENSEUP=4
Star is 45 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=24.4

TNO is 29.5 AU from the Sun and 28.8 AU from the Earth.
The TNO is moving 13.8 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 707 seconds.
The 1-sigma cross-track error in the shadow position is 5044 km.

The TNO has an absolute magnitude Hv=9.6
Diameter=72.4 km assuming a 5% albedo -- 5.2 sec chord
Diameter=29.6 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 500884, (2019/04/19 16:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.6 -26:28:24  0.9 10.26  39
35Eta Oph      17:11:29.2 -15:44:51  2.6  4.47  45
PPM 266364     17:05:54.1 -20:31:13  6.5  0.60  45
PPM 266322     17:04:27.2 -20:10:00  8.0  0.26  44
PPM 266344     17:05:09.0 -20:07:14  9.2  0.17  45
500884         17:05:05.4 -19:57:03 11.0        45
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 500884, (2019/04/19 16:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.26  39
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.47  45
PPM 266364     17:04:45.3 -20:29:41  6.5  0.60  45
PPM 266322     17:03:18.7 -20:08:26  8.0  0.26  44
PPM 266344     17:04:00.4 -20:05:42  9.2  0.17  45
500884         17:03:57.0 -19:55:30 11.0        44
Positions are for J2000

Event circumstances last updated at 2018/10/24 21:17:43 UT

Marc W. Buie, Southwest Research Institute

RECON