RECON: TNO occultation with 330836

Event between (330836) Orius and star UC4-270-133798A with event index number of 68500

Geocentric closest approach at 2017/08/14 16:15:32 UTC

J2000 position of star is 17:57:37.2 -36:04:10
Equinox of date position of star is 17:58:47.5 -36:04:13
Stellar brightness R=15.3, use SENSEUP=128
Star is 134 degrees from the moon. Moon is 54% illuminated.
TNO apparent brightness V=22.3

TNO is 16.8 AU from the Sun and 16.2 AU from the Earth.
The TNO is moving 10.9 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 844 seconds.
The 1-sigma cross-track error in the shadow position is 4931 km.

The TNO has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 5.8 sec chord
Diameter=25.8 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 330836, (2017/08/14 16:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:29.4 -26:28:11  0.9 21.10 155
Kap Sco        17:43:42.5 -39:02:15  2.4  4.21 136
PPM 296992     17:56:19.6 -36:28:39  6.3  0.64 135
PPM 297105     18:01:15.5 -35:55:39  7.7  0.52 134
PPM 297042     17:58:10.3 -36:16:25  8.7  0.24 134
330836         17:58:48.5 -36:04:13 15.3       134
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 330836, (2017/08/14 16:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.10 155
Kap Sco        17:42:29.3 -39:01:49  2.4  4.21 136
PPM 296992     17:55:08.1 -36:28:32  6.3  0.64 135
PPM 297105     18:00:04.3 -35:55:40  7.7  0.52 134
PPM 297042     17:56:58.8 -36:16:22  8.7  0.24 134
330836         17:57:37.2 -36:04:10 15.3       134
Positions are for J2000

Event circumstances last updated at 2017/05/16 18:31:46 UT

Marc W. Buie, Southwest Research Institute

RECON