RECON: TNO occultation with 04KF19

Event between 04KF19 and star UC4-342-080211 with event index number of 126441

Geocentric closest approach at 2018/06/07 22:02:44 UTC

J2000 position of star is 16:24:46.7 -21:44:50
Equinox of date position of star is 16:25:45.5 -21:47:02
Stellar brightness R=16.3
Star is 112 degrees from the moon. Moon is 39% illuminated.
TNO apparent brightness V=23.3

TNO is 41.3 AU from the Sun and 40.3 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 300 seconds.
The 1-sigma cross-track error in the shadow position is 3346 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=227.0 km assuming a 5% albedo -- 9.4 sec chord
Diameter=92.7 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 04KF19, (2018/06/07 22:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.4 -26:28:17  0.9  4.80 110
8Bet1Sco       16:06:30.7 -19:51:16  2.6  4.92 117
4Psi Oph       16:25:11.0 -20:04:44  4.2  1.72 113
PPM 265502     16:25:59.4 -22:16:36  7.9  0.49 112
PPM 265511     16:26:29.8 -21:43:46  9.2  0.16 112
04KF19         16:25:52.4 -21:47:18 16.3       112
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 04KF19, (2018/06/07 22:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9  4.80 110
8Bet1Sco       16:05:26.2 -19:48:20  2.6  4.92 117
4Psi Oph       16:24:06.1 -20:02:15  4.2  1.72 113
PPM 265502     16:24:53.5 -22:14:07  7.9  0.49 112
PPM 265511     16:25:24.1 -21:41:19  9.2  0.16 112
04KF19         16:24:46.7 -21:44:50 16.3       112
Positions are for J2000

Event circumstances last updated at 2016/07/01 17:36:00 UT

Marc W. Buie, Southwest Research Institute

RECON