RECON: TNO occultation with 11WG157

Event between 11WG157 and star UC4-647-012738 with event index number of 178733

Geocentric closest approach at 2019/01/27 22:50:31 UTC

J2000 position of star is 03:10:31.5 +39:19:19
Equinox of date position of star is 03:11:39.1 +39:23:13
Stellar brightness R=15.3, use SENSEUP=128
Star is 149 degrees from the moon. Moon is 49% illuminated.
TNO apparent brightness V=22.2

TNO is 30.7 AU from the Sun and 30.4 AU from the Earth.
The TNO is moving 10.3 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 943 seconds.
The 1-sigma cross-track error in the shadow position is 5155 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=213.8 km assuming a 5% albedo -- 20.7 sec chord
Diameter=87.3 km assuming a 30% albedo -- 8.4 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 11WG157, (2019/01/27 22:51UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:01.0 +16:32:46  0.8 29.44 149
Algol          03:09:25.0 +41:01:40  2.1  1.69 147
28Ome Per      03:12:31.7 +39:40:57  5.8  0.32 149
PPM 068117     03:08:45.9 +39:09:32  8.0  0.63 149
PPM 068168     03:11:34.9 +39:23:38  9.2  0.03 149
11WG157        03:11:45.6 +39:23:36 15.3       149
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 11WG157, (2019/01/27 22:51UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 29.44 149
Algol          03:08:10.1 +40:57:20  2.1  1.69 147
28Ome Per      03:11:17.3 +39:36:41  5.8  0.32 149
PPM 068117     03:07:32.0 +39:05:12  8.0  0.63 149
PPM 068168     03:10:20.8 +39:19:21  9.2  0.03 149
11WG157        03:10:31.5 +39:19:19 15.3       149
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:09:23 UT

Marc W. Buie, Southwest Research Institute

RECON