RECON: TNO occultation with 01KO77

Event between 01KO77 and star UC4-370-105209 with event index number of 103933

Geocentric closest approach at 2018/02/25 07:06:34 UTC

J2000 position of star is 17:47:30.8 -16:06:46
Equinox of date position of star is 17:48:30.7 -16:07:04
Stellar brightness R=16.1, use SENSEUP=128
Star is 173 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=23.5

TNO is 37.5 AU from the Sun and 37.9 AU from the Earth.
The TNO is moving 16.7 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 389 seconds.
The 1-sigma cross-track error in the shadow position is 4101 km.

The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 11.0 sec chord
Diameter=75.3 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 01KO77, (2018/02/25 07:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.4 -26:28:15  0.9 20.88 156
35Eta Oph      17:11:25.2 -15:44:46  2.6  8.94 165
PPM 233599     17:48:38.9 -14:43:52  5.9  1.39 173
PPM 233581     17:47:39.2 -16:00:34  8.4  0.24 173
PPM 233608     17:49:08.9 -16:00:43  9.7  0.18 173
01KO77         17:48:33.7 -16:07:05 16.1       174
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 01KO77, (2018/02/25 07:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 20.88 156
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.94 165
PPM 233599     17:47:36.8 -14:43:33  5.9  1.39 173
PPM 233581     17:46:36.4 -16:00:13  8.4  0.24 173
PPM 233608     17:48:06.1 -16:00:25  9.7  0.18 173
01KO77         17:47:30.8 -16:06:46 16.1       173
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:19:28 UT

Marc W. Buie, Southwest Research Institute

RECON