RECON: TNO occultation with 01KD77

Event between 01KD77 and star UC4-342-156877 with event index number of 130133

Geocentric closest approach at 2018/08/05 22:22:34 UTC

J2000 position of star is 18:36:41.7 -21:41:43
Equinox of date position of star is 18:37:46.2 -21:40:45
Stellar brightness R=15.8, use SENSEUP=128
Star is 140 degrees from the moon. Moon is 37% illuminated.
TNO apparent brightness V=21.3

TNO is 36.4 AU from the Sun and 35.6 AU from the Earth.
The TNO is moving 18.9 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 381 seconds.
The 1-sigma cross-track error in the shadow position is 1750 km.

The TNO has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 24.4 sec chord
Diameter=188.3 km assuming a 30% albedo -- 10.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 01KD77, (2018/08/05 22:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.0 -26:28:18  0.9 29.36 165
Nunki          18:56:25.0 -26:16:19  2.0  6.26 135
PPM 268697     18:39:59.9 -21:02:06  6.1  0.82 139
PPM 268611     18:36:14.7 -21:57:52  8.2  0.46 140
PPM 268658     18:38:08.7 -21:38:03  9.6  0.09 140
01KD77         18:37:48.6 -21:40:43 15.8       139
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 01KD77, (2018/08/05 22:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.36 165
Nunki          18:55:15.9 -26:17:49  2.0  6.26 135
PPM 268697     18:38:53.3 -21:03:10  6.1  0.82 139
PPM 268611     18:35:07.7 -21:58:50  8.2  0.46 140
PPM 268658     18:37:01.8 -21:39:03  9.6  0.09 140
01KD77         18:36:41.7 -21:41:43 15.8       140
Positions are for J2000

Event circumstances last updated at 2017/12/05 18:51:29 UT

Marc W. Buie, Southwest Research Institute

RECON