RECON: TNO occultation with 04VM131

Event between 04VM131 and star UC4-521-013877 with event index number of 180218

Geocentric closest approach at 2019/02/14 13:49:43 UTC

J2000 position of star is 05:36:24.3 +14:04:50
Equinox of date position of star is 05:37:23.6 +14:05:25
Stellar brightness R=15.6, use SENSEUP=128
Star is 10 degrees from the moon. Moon is 67% illuminated.
TNO apparent brightness V=23.8

TNO is 32.3 AU from the Sun and 31.8 AU from the Earth.
The TNO is moving 9.9 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 579 seconds.
The 1-sigma cross-track error in the shadow position is 1400 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=113.8 km assuming a 5% albedo -- 11.5 sec chord
Diameter=46.4 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 04VM131, (2019/02/14 13:50UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.5 +07:24:33  0.4  8.11  18
Bellatrix      05:26:09.5 +06:21:56  1.6  8.21  14
35 Ori         05:34:59.6 +14:19:02  5.6  0.65   9
PPM 121148     05:36:38.4 +14:26:19  8.2  0.40  10
PPM 121162     05:37:11.5 +14:08:14  9.4  0.09  10
04VM131        05:37:29.5 +14:05:29 15.6        10
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, (2019/02/14 13:50UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  8.11  18
Bellatrix      05:25:07.8 +06:20:58  1.6  8.21  14
35 Ori         05:33:54.3 +14:18:20  5.6  0.65   9
PPM 121148     05:35:33.0 +14:25:39  8.2  0.40  10
PPM 121162     05:36:06.3 +14:07:35  9.4  0.09  10
04VM131        05:36:24.3 +14:04:50 15.6        10
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:10:18 UT

Marc W. Buie, Southwest Research Institute

RECON