RECON: TNO occultation with 449097

Event between (449097) 12UT68 and star UC4-630-032198 with event index number of 184920

Geocentric closest approach at 2019/03/21 13:08:43 UTC

J2000 position of star is 06:12:06.4 +35:52:51
Equinox of date position of star is 06:13:16.6 +35:52:32
Stellar brightness R=16.4, use SENSEUP=128
Star is 94 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=21.4

TNO is 13.9 AU from the Sun and 13.8 AU from the Earth.
The TNO is moving 8.8 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 118 seconds.
The 1-sigma cross-track error in the shadow position is 922 km.

The TNO has an absolute magnitude Hv=9.6
Diameter=72.4 km assuming a 5% albedo -- 8.2 sec chord
Diameter=29.6 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 449097, (2019/03/21 13:09UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:29.4 +27:58:42  1.1 21.20  74
34Bet Aur      06:00:56.4 +44:56:50  1.9  9.38  95
PPM 071196     06:06:50.1 +33:35:46  6.1  2.65  95
PPM 071249     06:09:13.9 +36:03:39  7.8  0.86  94
PPM 071339     06:13:33.0 +36:07:40  8.8  0.25  94
449097         06:13:24.0 +35:52:29 16.4        93
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 449097, (2019/03/21 13:09UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 21.20  74
34Bet Aur      05:59:31.6 +44:56:51  1.9  9.38  95
PPM 071196     06:05:34.0 +33:35:57  6.1  2.65  95
PPM 071249     06:07:56.1 +36:03:54  7.8  0.86  94
PPM 071339     06:12:15.2 +36:08:01  8.8  0.25  94
449097         06:12:06.4 +35:52:51 16.4        94
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:12:50 UT

Marc W. Buie, Southwest Research Institute

RECON