RECON: TNO occultation with 04KF19

Event between 04KF19 and star UC4-344-079333 with event index number of 126420

Geocentric closest approach at 2017/09/13 21:39:05 UTC

J2000 position of star is 16:15:38.9 -21:22:58
Equinox of date position of star is 16:16:40.3 -21:25:30
Stellar brightness R=12.2, use SENSEUP=16
Star is 156 degrees from the moon. Moon is 43% illuminated.
TNO apparent brightness V=23.4

TNO is 41.3 AU from the Sun and 41.6 AU from the Earth.
The TNO is moving 13.0 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 586 seconds.
The 1-sigma cross-track error in the shadow position is 4065 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=227.0 km assuming a 5% albedo -- 17.5 sec chord
Diameter=92.7 km assuming a 30% albedo -- 7.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 04KF19, (2017/09/13 21:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:29.7 -26:28:11  0.9  5.95 158
8Bet1Sco       16:06:28.1 -19:51:09  2.6  2.86 153
PPM 265352     16:18:01.4 -20:08:48  6.5  1.32 156
PPM 265351     16:18:01.5 -21:20:49  7.2  0.32 156
PPM 265316     16:16:31.4 -21:37:55  9.1  0.21 156
PPM 265336     16:17:28.1 -21:19:55 10.2  0.20 156
04KF19         16:16:41.7 -21:25:33 12.2       156
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, (2017/09/13 21:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9  5.95 158
8Bet1Sco       16:05:26.2 -19:48:20  2.6  2.86 153
PPM 265352     16:16:59.2 -20:06:15  6.5  1.32 156
PPM 265351     16:16:58.8 -21:18:15  7.2  0.32 156
PPM 265316     16:15:28.6 -21:35:20  9.1  0.21 156
PPM 265336     16:16:25.3 -21:17:21 10.2  0.20 156
04KF19         16:15:38.9 -21:22:58 12.2       156
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:11:30 UT

Marc W. Buie, Southwest Research Institute

RECON