RECON: TNO occultation with 225088

Event between (225088) 07OR10 and star UC4-392-128663 with event index number of 191212

Geocentric closest approach at 2019/05/15 09:22:09 UTC

J2000 position of star is 22:27:18.7 -11:45:30
Equinox of date position of star is 22:28:15.8 -11:39:59
Stellar brightness R=15.0, use SENSEUP=128
Star is 146 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=21.3

TNO is 88.2 AU from the Sun and 88.4 AU from the Earth.
The TNO is moving 7.6 km/sec on the sky relative to the star, or, 0.4 arcsec/hr.
The 1-sigma error in the time of the event is 542 seconds.
The 1-sigma cross-track error in the shadow position is 4034 km.

The TNO has an absolute magnitude Hv=1.8
Diameter=2630.4 km assuming a 5% albedo -- 344.5 sec chord
Diameter=1073.8 km assuming a 30% albedo -- 140.7 sec chord
Dynamical classification is 10:3EEEEEEE
 
 
 
 
 
 
 
 

Star training set for 225088, (2019/05/15 09:22UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:43.0 -29:31:09  1.2 19.21 143
50 Aqr         22:25:29.2 -13:25:50  5.8  1.90 144
PPM 240265     22:27:14.2 -11:57:06  8.4  0.40 145
PPM 240294     22:27:58.7 -11:49:06  9.5  0.18 145
225088         22:28:20.4 -11:39:33 15.0       146
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 225088, (2019/05/15 09:22UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 19.21 143
50 Aqr         22:24:27.1 -13:31:46  5.8  1.90 144
PPM 240265     22:26:12.5 -12:03:03  8.4  0.40 145
PPM 240294     22:26:57.0 -11:55:03  9.5  0.18 145
225088         22:27:18.7 -11:45:30 15.0       146
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:56:09 UT

Marc W. Buie, Southwest Research Institute

RECON