RECON: TNO occultation with 11WG157

Event between 11WG157 and star UC4-654-015924 with event index number of 210408

Geocentric closest approach at 2019/08/31 20:43:45 UTC

J2000 position of star is 03:34:42.5 +40:40:40
Equinox of date position of star is 03:35:53.2 +40:44:09
Stellar brightness R=15.4, use SENSEUP=128
Star is 113 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=22.3

TNO is 30.7 AU from the Sun and 30.6 AU from the Earth.
The TNO is moving 11.2 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 873 seconds.
The 1-sigma cross-track error in the shadow position is 4983 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=213.8 km assuming a 5% albedo -- 19.1 sec chord
Diameter=87.3 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is 1:1
 
 
 
 
 
 
 
 

Star training set for 11WG157, (2019/08/31 20:44UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.1 +16:32:50  0.8 27.56 109
Algol          03:09:27.4 +41:01:48  2.1  5.03 117
PPM 068571     03:34:53.2 +39:57:53  5.8  0.81 114
PPM 046296     03:33:36.4 +40:59:11  6.7  0.52 114
PPM 046324     03:35:14.3 +40:53:31  9.4  0.21 113
PPM 046346     03:36:25.1 +40:48:01 10.1  0.10 113
11WG157        03:36:01.2 +40:44:32 15.4       113
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, (2019/08/31 20:44UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 27.56 109
Algol          03:08:10.1 +40:57:20  2.1  5.03 117
PPM 068571     03:33:35.0 +39:53:58  5.8  0.81 114
PPM 046296     03:32:17.7 +40:55:15  6.7  0.52 114
PPM 046324     03:33:55.5 +40:49:37  9.4  0.21 113
PPM 046346     03:35:06.3 +40:44:09 10.1  0.10 113
11WG157        03:34:42.5 +40:40:40 15.4       113
Positions are for J2000

Event circumstances last updated at 2017/09/01 17:04:33 UT

Marc W. Buie, Southwest Research Institute

RECON