RECON: TNO occultation with 10370

Event between (10370) Hylonome and star UC4-356-163323 with event index number of 208548

Geocentric closest approach at 2019/08/13 13:59:46 UTC

J2000 position of star is 18:46:32.4 -18:50:46
Equinox of date position of star is 18:47:34.6 -18:49:34
Stellar brightness R=15.2, use SENSEUP=128
Star is 19 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=22.6

TNO is 24.4 AU from the Sun and 23.6 AU from the Earth.
The TNO is moving 16.6 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 1234 seconds.
The 1-sigma cross-track error in the shadow position is 1900 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 6.9 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10370, (2019/08/13 14:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.8 -26:28:26  0.9 32.43  49
Nunki          18:56:28.8 -26:16:14  2.0  7.72  17
PPM 234997     18:47:10.6 -19:35:03  6.3  0.77  19
PPM 235021     18:48:42.4 -18:43:53  8.5  0.26  19
PPM 235006     18:47:53.7 -18:58:24  9.5  0.16  19
10370          18:47:41.5 -18:49:26 15.2        19
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, (2019/08/13 14:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.43  49
Nunki          18:55:15.9 -26:17:49  2.0  7.72  17
PPM 234997     18:46:01.2 -19:36:23  6.3  0.77  19
PPM 235021     18:47:33.4 -18:45:15  8.5  0.26  19
PPM 235006     18:46:44.6 -18:59:45  9.5  0.16  19
10370          18:46:32.4 -18:50:46 15.2        19
Positions are for J2000

Event circumstances last updated at 2017/09/01 16:59:34 UT

Marc W. Buie, Southwest Research Institute

RECON