RECON: TNO occultation with 04PY117

Event between 04PY117 and star GA0700:34809891 with event index number of 208227

Geocentric closest approach at 2019/08/28 15:19:31 UTC

J2000 position of star is 23:25:27.1 -19:02:39
Equinox of date position of star is 23:26:28.1 -18:56:14
Stellar brightness G=16.8, use SENSEUP=128
Star is 143 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=22.4

TNO is 32.8 AU from the Sun and 31.8 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 66 seconds.
The 1-sigma cross-track error in the shadow position is 1441 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=216.8 km assuming a 5% albedo -- 9.0 sec chord
Diameter=88.5 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 04PY117, (2019/08/28 15:20UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:44.0 -29:31:04  1.2 12.32 149
PPM 241574     23:25:09.9 -18:34:46  6.4  0.47 144
PPM 241567     23:24:46.4 -19:00:05  8.1  0.41 144
PPM 241597     23:26:04.9 -18:41:36  9.7  0.26 143
04PY117        23:26:28.8 -18:56:10 16.8       143
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 04PY117, (2019/08/28 15:20UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 12.32 149
PPM 241574     23:24:08.1 -18:41:16  6.4  0.47 144
PPM 241567     23:23:44.5 -19:06:35  8.1  0.41 144
PPM 241597     23:25:03.1 -18:48:06  9.7  0.26 143
04PY117        23:25:27.1 -19:02:39 16.8       143
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:36:21 UT

Marc W. Buie, Southwest Research Institute

RECON