RECON: TNO occultation with 469584

Event between (469584) 03YW179 and star UC4-534-048858 with event index number of 180739

Geocentric closest approach at 2019/02/15 23:02:15 UTC

J2000 position of star is 09:27:29.7 +16:42:42
Equinox of date position of star is 09:28:26.8 +16:38:11
Stellar brightness R=16.3, use SENSEUP=128
Star is 44 degrees from the moon. Moon is 81% illuminated.
TNO apparent brightness V=22.3

TNO is 36.1 AU from the Sun and 35.1 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 294 seconds.
The 1-sigma cross-track error in the shadow position is 3026 km.

The TNO has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 10.7 sec chord
Diameter=107.4 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 
 
 

Star training set for 469584, (2019/02/15 23:02UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:23.4 +11:52:23  1.3 10.97  55
PPM 126439     09:26:35.9 +16:30:07  6.3  0.49  43
PPM 126478     09:28:50.6 +16:47:32  8.8  0.18  44
469584         09:28:33.2 +16:37:40 16.3        44
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 469584, (2019/02/15 23:02UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 10.97  55
PPM 126439     09:25:32.4 +16:35:08  6.3  0.49  43
PPM 126478     09:27:47.1 +16:52:34  8.8  0.18  44
469584         09:27:29.7 +16:42:42 16.3        44
Positions are for J2000

Event circumstances last updated at 2017/03/05 17:43:35 UT

Marc W. Buie, Southwest Research Institute

RECON