RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0640:14553819 with event index number of 2270870

Geocentric closest approach at 2022/05/01 12:45:42 UTC

J2000 position of star is 17:23:25.2 -25:14:11
Equinox of date position of star is 17:24:47.3 -25:15:20
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 147 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=21.2

TNO is 30.9 AU from the Sun and 30.1 AU from the Earth.
The TNO is moving 15.7 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 106 seconds.
The 1-sigma cross-track error in the shadow position is 1181 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 22.1 sec chord
Diameter=141.6 km assuming a 30% albedo -- 9.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 470593, (2022/05/01 12:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.8 -26:28:47  0.9 12.21 159
35Eta Oph      17:11:39.6 -15:45:04  2.6  9.99 150
PPM 266746     17:23:03.9 -24:55:36  6.5  0.51 147
PPM 266794     17:24:32.2 -25:07:02  7.6  0.15 147
PPM 266789     17:24:30.1 -25:19:58  9.7  0.10 147
470593         17:24:47.8 -25:15:21 16.6       147
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 470593, (2022/05/01 12:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.21 159
35Eta Oph      17:10:22.7 -15:43:29  2.6  9.99 150
PPM 266746     17:21:41.5 -24:54:23  6.5  0.51 147
PPM 266794     17:23:09.7 -25:05:51  7.6  0.15 147
PPM 266789     17:23:07.5 -25:18:48  9.7  0.10 147
470593         17:23:25.2 -25:14:11 16.6       147
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:01:19 UT

Marc W. Buie, Southwest Research Institute

RECON