RECON: TNO occultation with 13PV74

Event between 13PV74 and star UC4-391-133268 with event index number of 133966

Geocentric closest approach at 2018/04/29 01:53:43 UTC

J2000 position of star is 22:28:31.1 -11:54:46
Equinox of date position of star is 22:29:26.4 -11:49:24
Stellar brightness R=15.4, use SENSEUP=128
Star is 127 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=22.0

TNO is 41.0 AU from the Sun and 41.4 AU from the Earth.
The TNO is moving 18.4 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 781 seconds.
The 1-sigma cross-track error in the shadow position is 5612 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=446.7 km assuming a 5% albedo -- 24.3 sec chord
Diameter=182.4 km assuming a 30% albedo -- 9.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 13PV74, (2018/04/29 01:54UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:39.5 -29:31:29  1.2 18.96 126
50 Aqr         22:25:25.8 -13:26:10  5.8  1.90 126
PPM 240265     22:27:10.9 -11:57:25  8.4  0.58 127
PPM 240320     22:29:06.8 -11:47:46  8.6  0.10 127
13PV74         22:29:29.4 -11:49:07 15.4       128
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 13PV74, (2018/04/29 01:54UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 18.96 126
50 Aqr         22:24:27.1 -13:31:46  5.8  1.90 126
PPM 240265     22:26:12.5 -12:03:03  8.4  0.58 127
PPM 240320     22:28:08.4 -11:53:25  8.6  0.10 127
13PV74         22:28:31.1 -11:54:46 15.4       127
Positions are for J2000

Event circumstances last updated at 2017/05/18 18:02:10 UT

Marc W. Buie, Southwest Research Institute

RECON