RECON: TNO occultation with 10XE91

Event between 10XE91 and star GA0960:00936231 with event index number of 235129

Geocentric closest approach at 2019/03/10 19:41:48 UTC

J2000 position of star is 05:46:04.3 +07:54:38
Equinox of date position of star is 05:47:06.6 +07:55:01
Stellar brightness G=15.5, use SENSEUP=128
Star is 50 degrees from the moon. Moon is 16% illuminated.
TNO apparent brightness V=22.8

TNO is 39.3 AU from the Sun and 39.2 AU from the Earth.
The TNO is moving 8.8 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 164 seconds.
The 1-sigma cross-track error in the shadow position is 2149 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=276.7 km assuming a 5% albedo -- 31.3 sec chord
Diameter=113.0 km assuming a 30% albedo -- 12.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 10XE91, (2019/03/10 19:42UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.7 +07:24:33  0.4  2.31  52
Bellatrix      05:26:09.7 +06:21:56  1.6  5.42  45
52 Ori         05:49:02.1 +06:27:34  5.5  1.53  51
PPM 149473     05:48:57.4 +07:57:57  8.2  0.46  51
PPM 149439     05:47:50.2 +07:48:11  9.1  0.21  50
10XE91         05:47:06.8 +07:55:01 15.5        50
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 10XE91, (2019/03/10 19:42UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  2.31  52
Bellatrix      05:25:07.8 +06:20:58  1.6  5.42  45
52 Ori         05:48:00.2 +06:27:15  5.5  1.53  51
PPM 149473     05:47:54.8 +07:57:38  8.2  0.46  51
PPM 149439     05:46:47.7 +07:47:50  9.1  0.21  50
10XE91         05:46:04.3 +07:54:38 15.5        50
Positions are for J2000

Event circumstances last updated at 2019/02/12 06:39:18 UT

Marc W. Buie, Southwest Research Institute

RECON