RECON: TNO occultation with 449097

Event between (449097) 12UT68 and star UC4-625-033956 with event index number of 157107

Geocentric closest approach at 2018/09/21 01:28:28 UTC

J2000 position of star is 06:33:31.2 +34:52:20
Equinox of date position of star is 06:34:40.6 +34:51:28
Stellar brightness R=13.5, use SENSEUP=32
Star is 143 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=21.3

TNO is 13.7 AU from the Sun and 13.8 AU from the Earth.
The TNO is moving 15.0 km/sec on the sky relative to the star, or, 5.4 arcsec/hr.
The 1-sigma error in the time of the event is 76 seconds.
The 1-sigma cross-track error in the shadow position is 798 km.

The TNO has an absolute magnitude Hv=9.6
Diameter=72.4 km assuming a 5% albedo -- 4.8 sec chord
Diameter=29.6 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 449097, (2018/09/21 01:28UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:27.6 +27:58:46  1.1 16.74 160
34Bet Aur      06:00:54.2 +44:56:50  1.9 11.98 133
PPM 071742     06:33:40.5 +32:26:24  6.0  2.43 143
PPM 071753     06:33:59.9 +35:02:52  8.1  0.25 143
PPM 071744     06:33:48.1 +34:50:58 10.7  0.20 143
449097         06:34:46.0 +34:51:24 13.5       143
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, (2018/09/21 01:28UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 16.74 160
34Bet Aur      05:59:31.6 +44:56:51  1.9 11.98 133
PPM 071742     06:32:27.2 +32:27:18  6.0  2.43 143
PPM 071753     06:32:45.0 +35:03:47  8.1  0.25 143
PPM 071744     06:32:33.3 +34:51:52 10.7  0.20 143
449097         06:33:31.2 +34:52:20 13.5       143
Positions are for J2000

Event circumstances last updated at 2017/05/19 18:03:30 UT

Marc W. Buie, Southwest Research Institute

RECON