RECON: TNO occultation with 14LM28

Event between 14LM28 and star UC4-557-057690 with event index number of 199941

Geocentric closest approach at 2018/10/06 19:04:19 UTC

J2000 position of star is 16:50:35.9 +21:18:58
Equinox of date position of star is 16:51:21.0 +21:17:14
Stellar brightness R=14.2, use SENSEUP=64
Star is 85 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=22.2

TNO is 16.8 AU from the Sun and 17.2 AU from the Earth.
The TNO is moving 19.7 km/sec on the sky relative to the star, or, 5.7 arcsec/hr.
The 1-sigma error in the time of the event is 112 seconds.
The 1-sigma cross-track error in the shadow position is 4457 km.

The TNO has an absolute magnitude Hv=9.6
Diameter=73.1 km assuming a 5% albedo -- 3.7 sec chord
Diameter=29.8 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 14LM28, (2018/10/06 19:04UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:34.4 +38:48:07  0.0 28.71 102
27Bet Her      16:31:01.7 +21:26:59  2.8  4.75  80
PPM 105335     16:55:43.7 +20:55:46  6.5  1.07  86
PPM 105283     16:52:34.1 +20:32:37  7.8  0.79  85
PPM 105254     16:50:38.1 +21:38:48  9.0  0.40  84
PPM 105268     16:51:18.4 +21:04:13 11.0  0.22  85
14LM28         16:51:24.3 +21:17:06 14.2        85
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 14LM28, (2018/10/06 19:04UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.6 +38:47:06  0.0 28.71 102
27Bet Her      16:30:13.1 +21:29:22  2.8  4.75  80
PPM 105335     16:54:55.2 +20:57:30  6.5  1.07  86
PPM 105283     16:51:45.4 +20:34:26  7.8  0.79  85
PPM 105254     16:49:49.9 +21:40:41  9.0  0.40  84
PPM 105268     16:50:29.9 +21:06:05 11.0  0.22  85
14LM28         16:50:35.9 +21:18:58 14.2        85
Positions are for J2000

Event circumstances last updated at 2017/07/01 17:40:23 UT

Marc W. Buie, Southwest Research Institute

RECON