RECON: TNO occultation with 04VM131

Event between 04VM131 and star UC4-521-015074 with event index number of 164205

Geocentric closest approach at 2018/11/14 17:53:04 UTC

J2000 position of star is 05:44:43.9 +14:08:59
Equinox of date position of star is 05:45:43.2 +14:09:21
Stellar brightness R=15.9, use SENSEUP=128
Star is 132 degrees from the moon. Moon is 42% illuminated.
TNO apparent brightness V=23.7

TNO is 32.1 AU from the Sun and 31.3 AU from the Earth.
The TNO is moving 20.1 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 272 seconds.
The 1-sigma cross-track error in the shadow position is 2000 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=113.8 km assuming a 5% albedo -- 5.7 sec chord
Diameter=46.4 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 04VM131, (2018/11/14 17:53UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.6 +07:24:33  0.4  7.21 133
Bellatrix      05:26:08.6 +06:21:55  1.6  9.17 126
131 Tau        05:48:17.7 +14:29:38  5.7  0.69 133
PPM 121311     05:44:02.4 +14:11:09  7.6  0.43 132
PPM 121322     05:44:37.0 +14:18:47  8.7  0.33 132
04VM131        05:45:48.3 +14:09:23 15.9       133
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 04VM131, (2018/11/14 17:53UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.21 133
Bellatrix      05:25:07.8 +06:20:58  1.6  9.17 126
131 Tau        05:47:13.1 +14:29:18  5.7  0.69 133
PPM 121311     05:42:58.0 +14:10:42  7.6  0.43 132
PPM 121322     05:43:32.5 +14:18:21  8.7  0.33 132
04VM131        05:44:43.9 +14:08:59 15.9       132
Positions are for J2000

Event circumstances last updated at 2017/05/19 18:05:39 UT

Marc W. Buie, Southwest Research Institute

RECON