RECON: TNO occultation with 07UM126

Event between 07UM126 and star UC4-352-007254 with event index number of 169434

Geocentric closest approach at 2018/12/28 22:09:21 UTC

J2000 position of star is 05:13:46.2 -19:39:56
Equinox of date position of star is 05:14:31.5 -19:38:47
Stellar brightness R=14.3, use SENSEUP=64
Star is 105 degrees from the moon. Moon is 55% illuminated.
TNO apparent brightness V=22.4

TNO is 16.3 AU from the Sun and 15.6 AU from the Earth.
The TNO is moving 22.9 km/sec on the sky relative to the star, or, 7.3 arcsec/hr.
The 1-sigma error in the time of the event is 413 seconds.
The 1-sigma cross-track error in the shadow position is 2153 km.

The TNO has an absolute magnitude Hv=10.1
Diameter=58.9 km assuming a 5% albedo -- 2.6 sec chord
Diameter=24.0 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 07UM126, (2018/12/28 22:09UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:27.1 -08:10:52  0.1 11.47 105
Nihal          05:29:03.6 -20:44:44  2.8  3.57 101
PPM 215575     05:19:41.1 -18:06:40  6.0  1.95 104
PPM 215503     05:16:14.2 -19:02:25  8.1  0.72 104
PPM 215479     05:15:09.5 -19:51:07  9.4  0.25 105
07UM126        05:14:35.7 -19:38:40 14.3       105
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 07UM126, (2018/12/28 22:09UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 11.47 105
Nihal          05:28:14.7 -20:45:36  2.8  3.57 101
PPM 215575     05:18:50.9 -18:07:47  6.0  1.95 104
PPM 215503     05:15:24.4 -19:03:38  8.1  0.72 104
PPM 215479     05:14:20.0 -19:52:22  9.4  0.25 105
07UM126        05:13:46.2 -19:39:56 14.3       105
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:07:39 UT

Marc W. Buie, Southwest Research Institute

RECON