RECON: TNO occultation with 119878

Event between (119878) 02CY224 and star UC4-459-047518 with event index number of 180697

Geocentric closest approach at 2019/02/28 13:26:14 UTC

J2000 position of star is 10:36:50.3 +01:47:15
Equinox of date position of star is 10:37:43.3 +01:41:53
Stellar brightness R=14.8, use SENSEUP=128
Star is 113 degrees from the moon. Moon is 30% illuminated.
TNO apparent brightness V=22.0

TNO is 39.2 AU from the Sun and 38.2 AU from the Earth.
The TNO is moving 25.0 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 84 seconds.
The 1-sigma cross-track error in the shadow position is 1944 km.

The TNO has an absolute magnitude Hv=6.1
Diameter=363.1 km assuming a 5% albedo -- 14.5 sec chord
Diameter=148.2 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is 12:5EEEEEEE
 
 
 
 
 
 
 
 

Star training set for 119878, (2019/02/28 13:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:23.5 +11:52:22  1.3 12.39 123
30Bet Sex      10:31:16.2 -00:44:09  4.8  2.93 114
PPM 156973     10:35:31.9 +01:39:40  7.6  0.57 114
PPM 157002     10:37:16.8 +01:38:13  9.4  0.15 113
119878         10:37:49.5 +01:41:15 14.8       113
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 119878, (2019/02/28 13:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 12.39 123
30Bet Sex      10:30:17.4 -00:38:14  4.8  2.93 114
PPM 156973     10:34:32.7 +01:45:38  7.6  0.57 114
PPM 157002     10:36:17.6 +01:44:12  9.4  0.15 113
119878         10:36:50.3 +01:47:15 14.8       113
Positions are for J2000

Event circumstances last updated at 2017/03/05 17:46:44 UT

Marc W. Buie, Southwest Research Institute

RECON