RECON: TNO occultation with 01KD77

Event between 01KD77 and star UC4-342-163657 with event index number of 122832

Geocentric closest approach at 2018/03/10 18:33:18 UTC

J2000 position of star is 18:43:56.1 -21:36:15
Equinox of date position of star is 18:45:00.5 -21:35:06
Stellar brightness R=15.6, use SENSEUP=128
Star is 6 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=21.4

TNO is 36.4 AU from the Sun and 36.7 AU from the Earth.
The TNO is moving 16.0 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 470 seconds.
The 1-sigma cross-track error in the shadow position is 2068 km.

The TNO has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 28.9 sec chord
Diameter=188.3 km assuming a 30% albedo -- 11.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 01KD77, (2018/03/10 18:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.5 -26:28:15  0.9 31.01  26
Nunki          18:56:23.5 -26:16:21  2.0  5.36  11
28 Sgr         18:47:26.4 -22:22:18  4.9  0.97   7
PPM 268766     18:43:04.5 -21:18:14  8.5  0.53   6
PPM 268844     18:46:08.0 -21:30:31  8.8  0.27   6
01KD77         18:45:01.5 -21:35:05 15.6         6
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, (2018/03/10 18:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 31.01  26
Nunki          18:55:15.9 -26:17:49  2.0  5.36  11
28 Sgr         18:46:20.7 -22:23:32  4.9  0.97   7
PPM 268766     18:41:59.3 -21:19:21  8.5  0.53   6
PPM 268844     18:45:02.7 -21:31:43  8.8  0.27   6
01KD77         18:43:56.1 -21:36:15 15.6         6
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:20:05 UT

Marc W. Buie, Southwest Research Institute

RECON