RECON: TNO occultation with 15KK178

Event between 15KK178 and star GA0720:06660791 with event index number of 1589945

Geocentric closest approach at 2020/03/04 06:19:18 UTC

J2000 position of star is 16:51:15.4 -17:38:35
Equinox of date position of star is 16:52:23.3 -17:40:29
Stellar brightness G=16.6, use SENSEUP=128
Star is 162 degrees from the moon. Moon is 65% illuminated.
TNO apparent brightness V=22.4

TNO is 37.2 AU from the Sun and 37.2 AU from the Earth.
The TNO is moving 6.5 km/sec on the sky relative to the star, or, 0.9 arcsec/hr.
The 1-sigma error in the time of the event is 390 seconds.
The 1-sigma cross-track error in the shadow position is 2182 km.

The TNO has an absolute magnitude Hv=6.5
Diameter=307.6 km assuming a 5% albedo -- 47.4 sec chord
Diameter=125.6 km assuming a 30% albedo -- 19.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 15KK178, (2020/03/04 06:19UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:38.9 -26:28:30  0.9 10.14 158
35Eta Oph      17:11:32.2 -15:44:55  2.6  4.96 165
PPM 232348     16:57:11.8 -16:50:12  6.3  1.41 163
PPM 232237     16:52:34.3 -17:58:23  8.3  0.30 162
PPM 232247     16:53:11.3 -17:41:56  8.9  0.18 162
15KK178        16:52:25.7 -17:40:33 16.6       162
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 15KK178, (2020/03/04 06:19UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.14 158
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.96 165
PPM 232348     16:56:02.0 -16:48:22  6.3  1.41 163
PPM 232237     16:51:23.9 -17:56:25  8.3  0.30 162
PPM 232247     16:52:01.1 -17:39:59  8.9  0.18 162
15KK178        16:51:15.4 -17:38:35 16.6       162
Positions are for J2000

Event circumstances last updated at 2019/07/02 02:31:57 UT

Marc W. Buie, Southwest Research Institute

RECON