RECON: TNO occultation with 574398

Event between (574398) 10LO33 and star GA0900:15954169 with event index number of 2519164

Geocentric closest approach at 2024/06/23 21:20:16 UTC

J2000 position of star is 20:51:52.7 +00:59:46
Equinox of date position of star is 20:52:59.4 +01:04:45
Stellar brightness G=13.8, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 30 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=20.7

TNO is 15.7 AU from the Sun and 15.0 AU from the Earth.
The TNO is moving 14.4 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 422 seconds.
The 1-sigma cross-track error in the shadow position is 2584 km.

The TNO has an absolute magnitude Hv=8.6
Diameter=116.4 km assuming a 5% albedo -- 8.1 sec chord
Diameter=47.5 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 574398, (2024/06/23 21:20UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:59.8 -29:29:31  1.2 42.87  40
Tarazed        19:47:25.4 +10:40:28  2.7 18.93  36
PPM 181099     20:50:32.7 -00:28:17  6.4  1.69  28
PPM 170883     20:54:12.7 +02:03:29  8.4  1.01  31
PPM 170832     20:52:34.0 +01:03:38  9.6  0.14  29
574398         20:53:07.5 +01:05:22 13.8        30
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 574398, (2024/06/23 21:20UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 42.87  40
Tarazed        19:46:15.6 +10:36:48  2.7 18.93  36
PPM 181099     20:49:17.2 -00:33:48  6.4  1.69  28
PPM 170883     20:52:58.3 +01:57:52  8.4  1.01  31
PPM 170832     20:51:19.2 +00:58:04  9.6  0.14  29
574398         20:51:52.7 +00:59:46 13.8        30
Positions are for J2000

Event circumstances last updated at 2021/10/28 23:02:14 UT

Marc W. Buie, Southwest Research Institute

RECON