RECON: TNO occultation with 10370

Event between (10370) Hylonome and star UC4-356-161146 with event index number of 116783

Geocentric closest approach at 2018/05/19 03:38:07 UTC

J2000 position of star is 18:44:10.5 -18:50:04
Equinox of date position of star is 18:45:10.2 -18:48:58
Stellar brightness R=16.4
Star is 172 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=22.5

TNO is 24.0 AU from the Sun and 23.2 AU from the Earth.
The TNO is moving 15.5 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 1169 seconds.
The 1-sigma cross-track error in the shadow position is 2362 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 7.4 sec chord
Diameter=46.9 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10370, (2018/05/19 03:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.2 -26:28:16  0.9 31.91 141
Nunki          18:56:24.2 -26:16:20  2.0  7.89 172
PPM 234930     18:44:00.1 -19:15:54  6.1  0.54 172
PPM 234956     18:45:13.7 -19:17:53  7.2  0.48 172
PPM 234955     18:45:09.4 -18:44:40  8.6  0.07 172
10370          18:45:15.2 -18:48:53 16.4       172
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 10370, (2018/05/19 03:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 31.91 141
Nunki          18:55:15.9 -26:17:49  2.0  7.89 172
PPM 234930     18:42:55.1 -19:17:04  6.1  0.54 172
PPM 234956     18:44:08.8 -19:19:04  7.2  0.48 172
PPM 234955     18:44:04.7 -18:45:51  8.6  0.07 172
10370          18:44:10.5 -18:50:04 16.4       172
Positions are for J2000

Event circumstances last updated at 2016/12/10 17:27:51 UT

Marc W. Buie, Southwest Research Institute

RECON