RECON: TNO occultation with 04MW8

Event between 04MW8 and star UC4-403-135405 with event index number of 208080

Geocentric closest approach at 2019/06/21 23:12:39 UTC

J2000 position of star is 21:36:42.2 -09:30:48
Equinox of date position of star is 21:37:38.9 -09:26:01
Stellar brightness R=16.5, use SENSEUP=128
Star is 8 degrees from the moon. Moon is 81% illuminated.
TNO apparent brightness V=22.9

TNO is 25.8 AU from the Sun and 25.2 AU from the Earth.
The TNO is moving 11.4 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 544 seconds.
The 1-sigma cross-track error in the shadow position is 3211 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=112.7 km assuming a 5% albedo -- 9.9 sec chord
Diameter=46.0 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 04MW8, (2019/06/21 23:13UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:43.3 -29:31:07  1.2 27.61  21
PPM 239151     21:40:30.8 -10:29:18  6.1  1.26   6
PPM 205414     21:38:52.7 -09:30:31  8.3  0.29   7
04MW8          21:37:44.7 -09:25:31 16.5         8
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 04MW8, (2019/06/21 23:13UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 27.61  21
PPM 239151     21:39:28.1 -10:34:38  6.1  1.26   6
PPM 205414     21:37:50.3 -09:35:49  8.3  0.29   7
04MW8          21:36:42.2 -09:30:48 16.5         8
Positions are for J2000

Event circumstances last updated at 2017/09/01 16:58:41 UT

Marc W. Buie, Southwest Research Institute

RECON