RECON: TNO occultation with 469505

Event between (469505) 03FE128 and star UC4-369-071663 with event index number of 147988

Geocentric closest approach at 2017/06/04 21:30:07 UTC

J2000 position of star is 15:39:28.3 -16:13:06
Equinox of date position of star is 15:40:24.9 -16:16:17
Stellar brightness R=16.5
Star is 33 degrees from the moon. Moon is 81% illuminated.
TNO apparent brightness V=21.9

TNO is 36.1 AU from the Sun and 35.1 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 116 seconds.
The 1-sigma cross-track error in the shadow position is 1524 km.

The TNO has an absolute magnitude Hv=6.3
Diameter=331.1 km assuming a 5% albedo -- 14.7 sec chord
Diameter=135.2 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 
 
 

Star training set for 469505, (2017/06/04 21:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:28.7 -26:28:09  0.9 15.46  47
8Bet1Sco       16:06:27.2 -19:51:07  2.6  7.14  40
44Eta Lib      15:45:03.4 -15:43:38  5.4  1.23  34
PPM 230630     15:43:45.4 -16:04:07  7.2  0.82  34
PPM 230529     15:40:05.4 -16:11:05  9.7  0.13  33
469505         15:40:27.5 -16:16:26 16.5        33
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 469505, (2017/06/04 21:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 15.46  47
8Bet1Sco       16:05:26.2 -19:48:20  2.6  7.14  40
44Eta Lib      15:44:04.4 -15:40:23  5.4  1.23  34
PPM 230630     15:42:46.2 -16:00:50  7.2  0.82  34
PPM 230529     15:39:06.3 -16:07:45  9.7  0.13  33
469505         15:39:28.3 -16:13:06 16.5        33
Positions are for J2000

Event circumstances last updated at 2016/09/01 18:13:54 UT

Marc W. Buie, Southwest Research Institute

RECON