RECON: TNO occultation with 175113

Event between (175113) 04PF115 and star UC4-353-195013 with event index number of 118229

Geocentric closest approach at 2018/05/22 15:10:55 UTC

J2000 position of star is 23:07:10.1 -19:35:03
Equinox of date position of star is 23:08:03.5 -19:29:35
Stellar brightness R=14.2
Star is 169 degrees from the moon. Moon is 55% illuminated.
TNO apparent brightness V=20.8

TNO is 41.6 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 11.5 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 267 seconds.
The 1-sigma cross-track error in the shadow position is 1809 km.

The TNO has an absolute magnitude Hv=4.4
Diameter=794.4 km assuming a 5% albedo -- 66.0 sec chord
Diameter=324.3 km assuming a 30% albedo -- 27.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 175113, (2018/05/22 15:11UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:39.7 -29:31:28  1.2 10.27 161
PPM 274532     23:03:43.0 -20:46:20  6.1  1.65 169
PPM 241192     23:07:37.5 -19:21:38  8.4  0.17 170
175113         23:08:08.7 -19:29:04 14.2       169
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 175113, (2018/05/22 15:11UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 10.27 161
PPM 274532     23:02:44.2 -20:52:17  6.1  1.65 169
PPM 241192     23:06:39.0 -19:27:37  8.4  0.17 170
175113         23:07:10.1 -19:35:03 14.2       169
Positions are for J2000

Event circumstances last updated at 2016/10/09 17:27:50 UT

Marc W. Buie, Southwest Research Institute

RECON