RECON: TNO occultation with 10WM75

Event between 10WM75 and star GA0940:01069471 with event index number of 2109482

Geocentric closest approach at 2024/02/11 16:15:22 UTC

J2000 position of star is 06:02:04.0 +05:53:36
Equinox of date position of star is 06:03:14.3 +05:53:31
Stellar brightness G=13.8, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 102 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=22.5

TNO is 43.2 AU from the Sun and 42.6 AU from the Earth.
The TNO is moving 15.5 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 317 seconds.
The 1-sigma cross-track error in the shadow position is 2431 km.

The TNO has an absolute magnitude Hv=6.0
Diameter=373.3 km assuming a 5% albedo -- 24.3 sec chord
Diameter=152.4 km assuming a 30% albedo -- 9.9 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 10WM75, (2024/02/11 16:09UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:28.7 +07:24:34  0.4  2.29 101
Bellatrix      05:26:25.5 +06:22:10  1.6  9.19  93
63 Ori         06:06:15.4 +05:25:00  6.4  0.86 103
PPM 149763     06:02:01.1 +05:48:07  8.4  0.35 102
PPM 149820     06:04:24.8 +05:43:34  9.4  0.31 103
PPM 149817     06:04:10.9 +05:43:13 11.2  0.27 103
10WM75         06:03:21.5 +05:53:30 13.8       103
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 10WM75, (2024/02/11 16:09UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  2.29 101
Bellatrix      05:25:07.8 +06:20:58  1.6  9.19  93
63 Ori         06:04:58.1 +05:25:12  6.4  0.86 103
PPM 149763     06:00:43.7 +05:48:10  8.4  0.35 102
PPM 149820     06:03:07.5 +05:43:42  9.4  0.31 103
PPM 149817     06:02:53.6 +05:43:21 11.2  0.27 103
10WM75         06:02:04.0 +05:53:36 13.8       102
Positions are for J2000

Event circumstances last updated at 2021/11/16 00:48:38 UT

Marc W. Buie, Southwest Research Institute

RECON