RECON: TNO occultation with 523748

Event between (523748) 14UP224 and star GA0940:00775212 with event index number of 2262170

Geocentric closest approach at 2024/09/08 20:40:54 UTC

J2000 position of star is 05:30:52.6 +05:04:54
Equinox of date position of star is 05:32:09.1 +05:05:53
Stellar brightness G=14.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon. Moon is 27% illuminated.
Apparent brightness V=22.2

Object is 40.3 AU from the Sun and 40.4 AU from the Earth.
Apparent velocity is 11.9 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 153 seconds.
The 1-sigma cross-track error in the shadow position is 2490 km.

The object has an absolute magnitude Hv=6.0
Diameter=373.3 km assuming a 5% albedo -- 31.5 sec chord
Diameter=152.4 km assuming a 30% albedo -- 12.9 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 523748, (2024/09/08 20:34UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:30.6 +07:24:35  0.4  6.47 136
Bellatrix      05:26:27.4 +06:22:12  1.6  1.91 143
32 Ori         05:32:06.4 +05:57:53  4.0  0.87 141
PPM 149095     05:33:04.8 +05:19:30  7.4  0.32 141
PPM 149043     05:31:35.7 +04:53:51  9.6  0.25 141
PPM 149059     05:32:04.0 +05:00:41 10.1  0.09 141
523748         05:32:11.5 +05:05:55 14.7       141
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 523748, (2024/09/08 20:34UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  6.47 136
Bellatrix      05:25:07.8 +06:20:58  1.6  1.91 143
32 Ori         05:30:47.1 +05:56:52  4.0  0.87 141
PPM 149095     05:31:45.8 +05:18:30  7.4  0.32 141
PPM 149043     05:30:17.0 +04:52:48  9.6  0.25 141
PPM 149059     05:30:45.2 +04:59:39 10.1  0.09 141
523748         05:30:52.6 +05:04:54 14.7       141
Positions are for J2000

Event circumstances last updated at 2023/12/15 05:26:55 UT

Marc W. Buie, Southwest Research Institute

RECON