RECON: TNO occultation with 10XE91

Event between 10XE91 and star GA0980:01620085 with event index number of 2110115

Geocentric closest approach at 2022/11/02 04:35:08 UTC

J2000 position of star is 06:19:44.4 +08:41:33
Equinox of date position of star is 06:20:58.9 +08:40:52
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 130 degrees from the moon. Moon is 60% illuminated.
TNO apparent brightness V=22.9

TNO is 40.5 AU from the Sun and 40.0 AU from the Earth.
The TNO is moving 13.3 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 278 seconds.
The 1-sigma cross-track error in the shadow position is 2134 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=280.6 km assuming a 5% albedo -- 21.1 sec chord
Diameter=114.5 km assuming a 30% albedo -- 8.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 10XE91, (2022/11/02 04:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:24.5 +07:24:34  0.4  6.22 123
Alhena         06:39:01.9 +16:22:40  1.9  8.87 136
PPM 150426     06:25:17.2 +08:52:17  6.2  1.08 131
PPM 150265     06:19:55.4 +09:02:10  7.0  0.44 129
PPM 150284     06:20:45.5 +09:00:24  8.7  0.33 130
PPM 150297     06:21:14.4 +08:38:29 10.4  0.07 130
10XE91         06:20:59.2 +08:40:52 16.0       130
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 10XE91, (2022/11/02 04:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  6.22 123
Alhena         06:37:42.8 +16:23:57  1.9  8.87 136
PPM 150426     06:24:02.3 +08:53:06  6.2  1.08 131
PPM 150265     06:18:40.3 +09:02:49  7.0  0.44 129
PPM 150284     06:19:30.5 +09:01:04  8.7  0.33 130
PPM 150297     06:19:59.5 +08:39:10 10.4  0.07 130
10XE91         06:19:44.4 +08:41:33 16.0       130
Positions are for J2000

Event circumstances last updated at 2022/10/01 04:16:00 UT

Marc W. Buie, Southwest Research Institute

RECON