RECON: TNO occultation with 01KD77

Event between 01KD77 and star UC4-342-157210 with event index number of 122330

Geocentric closest approach at 2017/05/04 23:28:49 UTC

J2000 position of star is 18:36:56.4 -21:38:11
Equinox of date position of star is 18:37:55.6 -21:37:18
Stellar brightness R=14.7
Star is 121 degrees from the moon. Moon is 69% illuminated.
TNO apparent brightness V=21.3

TNO is 36.3 AU from the Sun and 35.7 AU from the Earth.
The TNO is moving 11.8 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 487 seconds.
The 1-sigma cross-track error in the shadow position is 2260 km.

The TNO has an absolute magnitude Hv=5.6
Diameter=452.9 km assuming a 5% albedo -- 38.9 sec chord
Diameter=184.9 km assuming a 30% albedo -- 15.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 01KD77, (2017/05/04 23:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:28.4 -26:28:09  0.9 29.43  92
Nunki          18:56:20.4 -26:16:25  2.0  6.26 125
PPM 268697     18:39:55.4 -21:02:10  6.1  0.74 122
PPM 268611     18:36:10.2 -21:57:56  8.2  0.54 121
PPM 268658     18:38:04.2 -21:38:07  9.6  0.03 121
01KD77         18:37:58.8 -21:37:15 14.7       121
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, (2017/05/04 23:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 29.43  92
Nunki          18:55:15.9 -26:17:49  2.0  6.26 125
PPM 268697     18:38:53.3 -21:03:09  6.1  0.74 122
PPM 268611     18:35:07.6 -21:58:50  8.2  0.54 121
PPM 268658     18:37:01.8 -21:39:03  9.6  0.03 121
01KD77         18:36:56.4 -21:38:11 14.7       121
Positions are for J2000

Event circumstances last updated at 2016/06/09 16:03:49 UT

Marc W. Buie, Southwest Research Institute

RECON