RECON: TNO occultation with 98WG24

Event between 98WG24 and star UC4-567-035272 with event index number of 188316

Geocentric closest approach at 2019/04/24 22:53:43 UTC

J2000 position of star is 07:02:39.9 +23:19:17
Equinox of date position of star is 07:03:43.0 +23:17:43
Stellar brightness R=12.0, use SENSEUP=16
Star is 178 degrees from the moon. Moon is 69% illuminated.
TNO apparent brightness V=22.8

TNO is 40.0 AU from the Sun and 40.3 AU from the Earth.
The TNO is moving 14.6 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 598 seconds.
The 1-sigma cross-track error in the shadow position is 2241 km.

The TNO has an absolute magnitude Hv=6.6
Diameter=295.1 km assuming a 5% albedo -- 20.3 sec chord
Diameter=120.5 km assuming a 30% albedo -- 8.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 98WG24, (2019/04/24 22:54UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:29.8 +27:58:41  1.1 10.69 167
Alhena         06:38:49.6 +16:22:52  1.9  9.07 173
42Ome Gem      07:03:35.3 +24:11:10  5.2  0.90 177
PPM 096879     07:01:50.6 +23:24:42  7.2  0.47 178
PPM 096919     07:03:16.9 +23:38:49  9.0  0.38 178
PPM 096954     07:04:33.7 +23:08:11 10.8  0.23 178
98WG24         07:03:50.0 +23:17:32 12.0       177
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 98WG24, (2019/04/24 22:54UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 10.69 167
Alhena         06:37:42.8 +16:23:57  1.9  9.07 173
42Ome Gem      07:02:24.8 +24:12:55  5.2  0.90 177
PPM 096879     07:00:40.4 +23:26:24  7.2  0.47 178
PPM 096919     07:02:06.6 +23:40:34  9.0  0.38 178
PPM 096954     07:03:23.7 +23:09:57 10.8  0.23 178
98WG24         07:02:39.9 +23:19:17 12.0       178
Positions are for J2000

Event circumstances last updated at 2017/05/21 16:38:01 UT

Marc W. Buie, Southwest Research Institute

RECON