RECON: TNO occultation with 01KD77

Event between 01KD77 and star UC4-342-157630 with event index number of 122321

Geocentric closest approach at 2017/04/26 20:00:38 UTC

J2000 position of star is 18:37:16.1 -21:38:08
Equinox of date position of star is 18:38:15.2 -21:37:14
Stellar brightness R=16.5
Star is 123 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=21.3

TNO is 36.3 AU from the Sun and 35.8 AU from the Earth.
The TNO is moving 8.3 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 723 seconds.
The 1-sigma cross-track error in the shadow position is 1769 km.

The TNO has an absolute magnitude Hv=5.6
Diameter=452.9 km assuming a 5% albedo -- 55.4 sec chord
Diameter=184.9 km assuming a 30% albedo -- 22.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 01KD77, (2017/04/26 20:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:28.3 -26:28:08  0.9 29.51 150
Nunki          18:56:20.3 -26:16:25  2.0  6.21 118
PPM 268697     18:39:55.4 -21:02:10  6.1  0.69 122
PPM 268611     18:36:10.1 -21:57:56  8.2  0.61 123
PPM 268658     18:38:04.1 -21:38:07  9.6  0.06 123
01KD77         18:38:18.4 -21:37:11 16.5       122
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, (2017/04/26 20:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 29.51 150
Nunki          18:55:15.9 -26:17:49  2.0  6.21 118
PPM 268697     18:38:53.3 -21:03:09  6.1  0.69 122
PPM 268611     18:35:07.6 -21:58:50  8.2  0.61 123
PPM 268658     18:37:01.8 -21:39:03  9.6  0.06 123
01KD77         18:37:16.1 -21:38:08 16.5       123
Positions are for J2000

Event circumstances last updated at 2016/06/07 02:33:06 UT

Marc W. Buie, Southwest Research Institute

RECON