RECON: TNO occultation with 10WG9

Event between 10WG9 and star GA1080:01459957 with event index number of 180673

Geocentric closest approach at 2019/02/17 18:32:21 UTC

J2000 position of star is 05:53:38.5 +19:08:50
Equinox of date position of star is 05:54:46.1 +19:08:59
Stellar brightness G=16.5, use SENSEUP=128
Star is 34 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=22.1

TNO is 23.8 AU from the Sun and 23.3 AU from the Earth.
The TNO is moving 15.4 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 102 seconds.
The 1-sigma cross-track error in the shadow position is 1774 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=134.9 km assuming a 5% albedo -- 8.7 sec chord
Diameter=55.1 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10WG9, (2019/02/17 18:32UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.5 +07:24:33  0.4 11.75  37
Alhena         06:38:49.0 +16:22:53  1.9 10.84  24
57 Ori         05:56:04.6 +19:45:06  5.6  0.68  33
PPM 121533     05:54:22.3 +18:58:29  8.4  0.20  34
10WG9          05:54:46.2 +19:08:59 16.5        34
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 10WG9, (2019/02/17 18:32UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 11.75  37
Alhena         06:37:42.8 +16:23:57  1.9 10.84  24
57 Ori         05:54:56.6 +19:44:58  5.6  0.68  33
PPM 121533     05:53:14.7 +18:58:19  8.4  0.20  34
10WG9          05:53:38.5 +19:08:50 16.5        34
Positions are for J2000

Event circumstances last updated at 2019/02/12 06:11:38 UT

Marc W. Buie, Southwest Research Institute

RECON