RECON: TNO occultation with 574372

Event between (574372) 10JO179 and star GA0960:04788149 with event index number of 2518286

Geocentric closest approach at 2026/02/11 05:51:33 UTC

J2000 position of star is 17:08:46.7 +07:56:09
Equinox of date position of star is 17:09:57.5 +07:54:21
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 36 degrees from the moon. Moon is 34% illuminated.
Apparent brightness V=21.9

Object is 61.4 AU from the Sun and 61.8 AU from the Earth.
Apparent velocity is 20.8 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 118 seconds.
The 1-sigma cross-track error in the shadow position is 2580 km.

The object has an absolute magnitude Hv=3.9
Diameter=986.3 km assuming a 5% albedo -- 48.0 sec chord
Diameter=402.7 km assuming a 30% albedo -- 19.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 574372, (2026/02/11 05:52UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:00.8 -26:29:15  0.9 35.67   2
Rasalhague     17:36:08.9 +12:32:35  2.1  7.92  42
PPM 163642     17:13:00.9 +07:51:53  6.3  0.74  36
PPM 163516     17:07:16.0 +07:49:16  7.6  0.69  36
PPM 163601     17:10:37.7 +07:55:20  9.7  0.15  36
574372         17:10:02.3 +07:54:14 15.9        36
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 574372, (2026/02/11 05:52UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 35.67   2
Rasalhague     17:34:56.3 +12:33:31  2.1  7.92  42
PPM 163642     17:11:45.3 +07:53:41  6.3  0.74  36
PPM 163516     17:06:00.3 +07:51:17  7.6  0.69  36
PPM 163601     17:09:22.2 +07:57:13  9.7  0.15  36
574372         17:08:46.7 +07:56:09 15.9        36
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:24:09 UT

Marc W. Buie, Southwest Research Institute

RECON