RECON: TNO occultation with 14JT80

Event between 14JT80 and star UC4-405-069616 with event index number of 136754

Geocentric closest approach at 2017/07/11 23:04:42 UTC

J2000 position of star is 17:11:29.0 -09:07:36
Equinox of date position of star is 17:12:25.9 -09:08:48
Stellar brightness R=12.0, use SENSEUP=16
Star is 64 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=22.3

TNO is 32.2 AU from the Sun and 31.4 AU from the Earth.
The TNO is moving 19.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 839 seconds.
The 1-sigma cross-track error in the shadow position is 5777 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=222.9 km assuming a 5% albedo -- 11.3 sec chord
Diameter=91.0 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 14JT80, (2017/07/11 23:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:29.1 -26:28:10  0.9 19.97  72
35Eta Oph      17:11:23.1 -15:44:44  2.6  6.60  63
PPM 232685     17:10:46.2 -10:32:41  5.6  1.46  64
PPM 200456     17:14:35.0 -09:18:12  7.8  0.55  64
PPM 200423     17:12:28.6 -09:15:05  9.5  0.10  64
14JT80         17:12:26.6 -09:08:49 12.0        64
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 14JT80, (2017/07/11 23:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 19.97  72
35Eta Oph      17:10:22.7 -15:43:29  2.6  6.60  63
PPM 232685     17:09:48.0 -10:31:26  5.6  1.46  64
PPM 200456     17:13:37.4 -09:17:02  7.8  0.55  64
PPM 200423     17:11:30.9 -09:13:52  9.5  0.10  64
14JT80         17:11:29.0 -09:07:36 12.0        64
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:09:42 UT

Marc W. Buie, Southwest Research Institute

RECON