RECON: TNO occultation with 469362

Event between (469362) 01KB77 and star UC4-391-074885 with event index number of 192367

Geocentric closest approach at 2019/05/24 04:30:06 UTC

J2000 position of star is 17:25:25.5 -11:52:59
Equinox of date position of star is 17:26:23.9 -11:53:50
Stellar brightness R=15.2, use SENSEUP=128
Star is 46 degrees from the moon. Moon is 73% illuminated.
TNO apparent brightness V=22.0

TNO is 28.6 AU from the Sun and 27.6 AU from the Earth.
The TNO is moving 21.8 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 169 seconds.
The 1-sigma cross-track error in the shadow position is 1231 km.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 9.1 sec chord
Diameter=81.5 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 469362, (2019/05/24 04:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.0 -26:28:24  0.9 19.63  56
35Eta Oph      17:11:29.5 -15:44:51  2.6  5.30  48
53Nu Ser       17:21:55.2 -12:51:54  4.0  1.48  46
PPM 233017     17:25:07.8 -11:43:06  8.1  0.38  46
PPM 233052     17:26:50.5 -11:59:33  9.1  0.12  45
469362         17:26:30.5 -11:53:56 15.2        45
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 469362, (2019/05/24 04:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.63  56
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.30  48
53Nu Ser       17:20:49.7 -12:50:49  4.0  1.48  46
PPM 233017     17:24:02.8 -11:42:06  8.1  0.38  46
PPM 233052     17:25:45.4 -11:58:36  9.1  0.12  45
469362         17:25:25.5 -11:52:59 15.2        46
Positions are for J2000

Event circumstances last updated at 2017/06/01 18:15:55 UT

Marc W. Buie, Southwest Research Institute

RECON