RECON: TNO occultation with 01KD77

Event between 01KD77 and star GA0680:32344976 with event index number of 189475

Geocentric closest approach at 2019/06/05 17:23:05 UTC

J2000 position of star is 18:49:46.1 -21:30:35
Equinox of date position of star is 18:50:52.3 -21:29:14
Stellar brightness G=14.7, use SENSEUP=128
Star is 177 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=21.3

TNO is 36.5 AU from the Sun and 35.6 AU from the Earth.
The TNO is moving 20.9 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 449 seconds.
The 1-sigma cross-track error in the shadow position is 1932 km.

The TNO has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 22.0 sec chord
Diameter=188.3 km assuming a 30% albedo -- 9.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 01KD77, (2019/06/05 17:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:25  0.9 32.34 145
Nunki          18:56:28.1 -26:16:15  2.0  4.95 176
30 Sgr         18:52:00.5 -22:08:18  6.3  0.70 177
PPM 268985     18:52:28.8 -21:59:39  8.5  0.62 177
PPM 268952     18:51:16.4 -21:49:37  9.1  0.35 177
01KD77         18:50:55.8 -21:29:10 14.7       177
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, (2019/06/05 17:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.34 145
Nunki          18:55:15.9 -26:17:49  2.0  4.95 176
30 Sgr         18:50:50.5 -22:09:44  6.3  0.70 177
PPM 268985     18:51:18.8 -22:01:06  8.5  0.62 177
PPM 268952     18:50:06.5 -21:51:03  9.1  0.35 177
01KD77         18:49:46.1 -21:30:35 14.7       177
Positions are for J2000

Event circumstances last updated at 2018/06/11 23:20:26 UT

Marc W. Buie, Southwest Research Institute

RECON